What Is Cardano, and Why Should You Care?

I’ve been involved in cryptocurrency since 2019.

And after all these years, I still find myself struggling to explain to people why I think this technology is so important.

Especially my dad.

Or my girlfriend, Cayla.

Neither wakes up in the morning wondering how decentralized blockchain networks are going to revolutionize global financial infrastructure.

And frankly, neither should have to.

Most people hear the word cryptocurrency and immediately think of Bitcoin, people getting rich overnight, or some guy on YouTube promising a 10,000% return.

I get it.

But what if I told you the most interesting thing about cryptocurrency might have absolutely nothing to do with getting rich?

What if it’s about changing how the internet works?

And what if we’re still in the early chapters of that story?

First, what the hell is a blockchain?

Imagine you and ten friends share a notebook.

Every time somebody sends money, buys something, or records an agreement, it gets written down.

But here’s the catch.

Nobody gets to secretly erase a page, change the numbers, or pretend a transaction never happened.

Everyone follows the same rules, and multiple computers keep copies of the records.

That’s the basic idea behind a blockchain.

Now imagine that notebook is available to people around the world, without requiring one bank, technology company, or government to control it.

That’s where things get interesting.

Cardano is one of the blockchain networks designed to make this possible.

And ADA is the cryptocurrency used to pay transaction fees, help secure the network, and participate in its governance.

But Cardano isn’t simply trying to create another form of money.

It’s trying to build infrastructure that other applications and businesses can use.

Why should the world care?

Let’s say you want to send money to someone in another country.

Or prove you graduated from college.

Or demonstrate that a product you bought is authentic.

Or prove you’re old enough to enter a website without giving that website your name, address, and birthday.

Today, these things often depend on different companies, databases, institutions, and middlemen.

Blockchain technology offers another possibility: shared records and digital proofs that can be independently verified.

That doesn’t mean every database needs to become a blockchain.

Your grocery store doesn’t need a global decentralized network to remember that you bought bananas.

But when multiple organizations need to trust the same information without putting one organization completely in charge, blockchain can become useful.

And that’s a much bigger idea than trading digital coins.

The part about digital identity that fascinates me

Think about how many times you’ve had to prove who you are.

At the airport.

At the bank.

Applying for a job.

Signing up for insurance.

Renting an apartment.

Buying something age-restricted.

Every time, somebody wants information about you.

And sometimes they want far more information than they actually need.

Imagine a future where your phone contains a secure digital wallet with verified credentials.

Your university could issue a digital diploma.

Your state could issue a digital driver’s license.

A professional organization could verify your qualifications.

And instead of repeatedly uploading photographs of sensitive documents, you could present a digital proof.

Here’s my favorite example.

You’re buying a beer.

The bartender needs to know you’re over 21.

But why should the bartender need your home address?

Or your exact birthday?

Or any other information unrelated to buying that beer?

With privacy-preserving digital credentials, you could potentially prove you’re old enough without revealing those details.

That’s the kind of future digital identity technology is working toward.

And this isn’t just some cryptocurrency fantasy.

In May 2025, the World Wide Web Consortium published its Verifiable Credentials 2.0 standards, establishing technical foundations for secure, machine-verifiable digital credentials.

That doesn’t mean everyone will use blockchain for identity. Many credentials can work without one.

But Cardano is one of the ecosystems exploring how decentralized identifiers, verifiable credentials, and privacy-preserving technologies could fit together.

Meet Midnight: Imagine Venmo, Except Your Financial Life Isn’t Everyone’s Business

Let’s talk about something almost everyone understands.

Venmo.

You go to dinner with friends.

The bill comes, somebody pays, and everyone sends their share.

Pretty convenient.

But depending on your privacy settings, other people may be able to see that you paid your friend, when you paid them, and whatever ridiculous emoji you included in the description.

Venmo allows public, friends-only, and private payments. The dollar amounts aren’t displayed in its social feed, and you can choose to keep transactions private.

But the fact that a payment app can double as a social feed raises an interesting question.

Why should our financial lives be anybody else’s entertainment?

Now imagine that instead of splitting a dinner bill, you’re paying for medical treatment.

Or receiving your paycheck.

Or paying a therapist.

Or transferring money between your business accounts.

Would you want those details available for strangers to examine?

Probably not.

And here’s where cryptocurrency gets complicated.

Many public blockchains record transactions on a publicly accessible ledger.

People might not immediately know which wallet belongs to you, but they can often see transactions, amounts, and wallet addresses.

And if somebody connects your identity to your wallet, they may be able to follow portions of your financial activity.

Imagine your Venmo history, except there’s no simple privacy-settings button to hide transactions already permanently recorded on a public blockchain.

That’s one of the problems privacy-focused blockchain technology is trying to address.

Enter Midnight

Midnight is a separate blockchain network associated with the Cardano ecosystem, designed to help applications protect sensitive information while still proving that certain conditions have been met.

It uses technology called zero-knowledge proofs.

Sounds like something you’d need a PhD to understand.

But you don’t.

Imagine applying for an apartment.

The landlord wants to know whether you make enough money to afford the rent.

Normally, you might hand over bank statements, pay stubs, or other personal financial documents.

Now imagine a system that could verify you meet the income requirement without revealing your exact salary, every purchase you’ve made, or how much money is sitting in your account.

You prove you qualify without handing over your entire financial life.

That’s the idea.

Or imagine a hospital verifying that your insurance covers a procedure without unnecessarily exposing sensitive medical information.

Or a business proving it has enough funds to complete a transaction without revealing its entire balance sheet.

Or an identity system proving you’re over 21 without revealing your birthday and home address.

Midnight is being designed to support these kinds of privacy-preserving applications.

And here’s the important distinction.

Midnight isn’t simply trying to hide everything.

It’s trying to make privacy programmable.

Certain information can remain private while other information can be verified or disclosed when necessary.

That could be particularly useful for businesses, financial institutions, and healthcare organizations that need both confidentiality and accountability.

These are potential applications, not claims that every example is already operating commercially on Midnight.

But they demonstrate why this technology could matter.

Cardano and Midnight: Two pieces of a bigger picture

Cardano provides a public blockchain where transactions and agreements can be independently verified.

Midnight introduces technology designed to keep sensitive information private while still allowing certain facts to be proven.

They’re separate networks, but they could complement one another.

Midnight also has its own token, NIGHT, which helps support its network’s economic design.

Think of Cardano as a city with public roads, businesses, and infrastructure.

Midnight is like adding secure offices, private meeting rooms, and locked filing cabinets.

You can still conduct business in the city.

But you don’t have to put every personal detail on a billboard.

And that, to me, is when blockchain starts becoming interesting to people who couldn’t care less about cryptocurrency.

So why Cardano?

There are plenty of blockchains.

Ethereum. Solana. Bitcoin. Cardano.

They have different designs, strengths, and limitations.

Cardano’s approach has emphasized research, security, decentralization, and long-term development.

It uses a system called proof of stake.

Instead of requiring enormous amounts of computing power to compete in a mining process, Cardano uses stake pools and ADA delegated by network participants to help secure the blockchain.

Cardano also has on-chain governance, allowing participants to influence decisions about the network’s future.

And its developers are working on technology such as Leios, intended to increase how much activity the network can handle.

Think of it like building a digital city.

Cardano provides the public roads and infrastructure.

Leios aims to make those roads handle more traffic.

Midnight aims to give businesses and individuals private spaces where sensitive information can be protected.

And governance helps residents influence the rules.

That’s the ambition.

Not all of it is finished, and not every planned integration has been proven at commercial scale.

But the bigger idea is worth understanding.

What most people get wrong about crypto

I think the biggest misunderstanding is that cryptocurrency and blockchain technology are the same thing.

They’re related, but they’re not identical.

Cryptocurrency is one application of blockchain technology.

The underlying technology can also support digital records, financial agreements, verifiable credentials, and the transfer of digital assets.

Another misunderstanding is that everything involving crypto must be a scam.

There are absolutely scams.

There are speculative tokens with little purpose.

There are projects making ridiculous promises.

And there are real security, privacy, and consumer-protection problems.

But those problems don’t automatically make every underlying technology useless.

The internet had fraud, spam, terrible businesses, and spectacular financial failures during its early development.

That didn’t make the internet itself worthless.

Of course, blockchain isn’t guaranteed to follow the internet’s trajectory. Many proposed blockchain applications may never become commercially useful.

The challenge is separating technology that solves real problems from technology looking for a problem to solve.

Why I think we’re still early

I’ve been watching this space since 2019.

And what’s fascinating to me is how much of the conversation still revolves around the price of cryptocurrencies rather than what the technology might actually accomplish.

Here’s what I mean when I say we’re early.

I don’t mean that buying ADA today guarantees you’ll become rich.

I mean that many of the practical applications people discuss — widespread digital credentials, programmable financial assets, interoperable blockchain networks, and privacy-preserving services — are still developing.

Think about the early internet.

People were fascinated that they could send emails.

Eventually, the internet became the foundation for shopping, banking, entertainment, navigation, and businesses that didn’t previously exist.

We didn’t know exactly what it would become.

Blockchain could follow a similar path in certain areas.

Or it could remain useful for a narrower set of applications.

The opportunity is still being tested.

And that’s precisely why I find it interesting.

The important question isn’t whether ADA reaches $1, $5, or $10.

It’s whether technology like Cardano eventually becomes useful enough that millions of people interact with it without even realizing they’re using a blockchain.

Imagine the world ten years from now

You apply for a job.

Instead of emailing copies of your diploma and certifications, you send verified digital credentials.

You rent an apartment.

Instead of handing over your entire financial history, you prove you meet the landlord’s requirements.

You buy a product.

You can verify where it came from and whether its certification is legitimate.

You travel internationally.

Certain identity checks become easier because trusted digital credentials can be verified across compatible systems.

Not all of this requires Cardano, Midnight, or even blockchain.

But it’s the kind of future that decentralized technology and privacy-preserving systems could help support.

And to me, that’s far more interesting than staring at a cryptocurrency price chart all day.

The bottom line

So here’s how I’d explain Cardano to my dad.

Or Cayla.

The internet made it easier for people to share information.

Blockchain is an attempt to make it easier for people to share and verify records, ownership, and agreements without always needing one company in charge.

Cardano is building one version of that infrastructure.

And Midnight is exploring how we can prove things about ourselves without having to reveal everything about ourselves.

Neither project’s success is guaranteed.

They face serious competition, difficult technical challenges, and the enormous task of convincing ordinary people and businesses to use their technology.

But if decentralized networks and verifiable digital identity become important parts of our lives, Cardano and Midnight could have meaningful roles to play.

We may still be early in figuring out what blockchain is actually good for.

And maybe that’s the most interesting part of all.

Because the biggest impact of blockchain might not be making cryptocurrency investors rich.

It might be making the internet a place where proving something is true doesn’t require giving away everything about yourself.

About the Author

Scott Randolph is a Portland, Oregon–based entrepreneur and cryptocurrency enthusiast who has been involved in the crypto space since 2019. Through ADA After Midnight, he explains Cardano and emerging blockchain technology in language anyone can understand.

Sources and Further Reading

• Cardano — What Is Cardano?
• Cardano — Digital Identity
• W3C — Verifiable Credentials 2.0 Standards
• Midnight — Official Website
• Midnight — Frequently Asked Questions
• Cardano — Governance
• Cardano — Proof of Stake
• Venmo — Privacy Settings Disclosure: The author holds ADA and NIGHT. This article is independent commentary, not investment advice. AI tools assisted with research and drafting.

Originally published on ADA After Midnight on November 5, 2026. Submitted by the original author for editorial consideration.