My grandmother keeps $2,000 in cash under her mattress.
When I asked her why, she said: “Banks are complicated. ATMs have too many buttons. At least I know where my money is.”
She’s 78, sure. But here’s what bothers me: crypto people would say the exact same thing about their wallets today. “I know where my Bitcoin is. I know where my Ethereum is. I know where my Solana is.”
Congratulations. You’ve built something your grandmother would understand perfectly. Which means you’ve failed.
Think about what “money” means. When you hand someone a $20 bill, you don’t explain the Federal Reserve. You don’t discuss monetary policy. You don’t clarify which bank issued it. You just… pay.
That’s what cash does. It abstracts away everything you don’t need to know.
Now look at crypto. To send someone money, you need to know what chain they’re on. You need matching wallets. You need compatible protocols. You need to understand gas fees, bridge protocols, and custody models.
We took the simplest human invention—money—and made it complex again.
The grandmother test
Here’s a thought experiment. Give your grandmother three envelopes:
- One with $100 in US dollars
- One with 0.0015 BTC
- One with a seed phrase to a wallet containing $100 in mixed crypto assets
Which one can she actually use? Which one actually functions as money?
The dollar wins. Not because it’s superior technology. Because it’s standardized. Every merchant accepts it. Every person recognizes it. Every transaction works the same way.
Why fragmentation kills adoption
Most crypto advocates think complexity is a feature. “You need to educate yourself,” they say. “Learn about blockchain. Understand the technology.”
But money doesn’t work like that. Nobody takes a course in monetary theory before buying groceries. The whole point of currency is that you don’t need to understand it to use it.
When you have 50 different chains, 200 different wallets, and thousands of different tokens—each with their own rules, fees, and transfer methods—you haven’t built money. You’ve built a hobby for people who enjoy spreadsheets.
Meanwhile, Venmo moves billions of dollars a day. Why? Because when you want to pay someone, you type their name and press send. That’s it. No chain selection. No gas optimization. No custody concerns.
My grandmother will never use crypto as it exists today. Neither will your barista. Neither will 99% of humanity.
And until we fix that, we’re just building expensive databases for each other.