It's not at all reasonable to compare crypto to bank accounts, i don't even understand how people can make statements like these. Bank accounts are nothing, the value is the currency they held.
There can be a stablecoin, if there is trust in the system. The problem is all the shitcoins, the thefts, the scams. Bitcoin if it was the only crypto i bet could be a stable asset.
Pegging is stupid, crypto was created exactly to avoid the fiat problems.
The USDC stablecoin "promises" that 1000 USDC == $1000 USD.
A savings account "promises" that 1000 in the bank account == $1000 USD. In fact, this trust is so strong, saying "I have $1000" implies that its in a savings account, because no one even bothers with physical cash anymore. The USD is already digitalized in practice.
The value of a bank account is the trust in our banks. When a bank says it has $1000 USD, no one denies that trust. If Celsius says it has 1000 USDC, do you trust it?
if there is trust in the system
There in lies the rub. How do you build trust?
Banks have built their trust over the past 100 years. Since the Great Depression, no one has lost money in their savings account. There are very few people left alive who even remember when banks lost our money. Even MMFs (the riskiest of the accounts I talked about earlier), have an incredible streak of reliability, only ~2 times they ever lost the peg in the last 100 years. A "stablecoin" loses its peg like every month or two, so its not like we can trust those pegs.
Meanwhile, all the hacks and rugpulls show that Cryptocoins are fully untrustworthy. Earning trust is the one and only legitimate thing about being a bank, and all these crypto-financial services are failing at it.
There's a reason why the historians are saying that "Cryptocoin community is speedrunning financial theory". Its because they keep making the same mistakes made 100 to 200 years ago, repeating all the mistakes of the financial systems of the past one by one. Its not "how" you hold money that's important, its the
TRUST that's important. But no one is working on the trust part yet. So... I guess we'll just wait around and see how long it takes for the community to figure that out.
The Stablecoin dudes are at least on the right track. They leverage pre-existing trust with pre-existing institutions (IE: USD) to build a veneer of trust. But its not enough, because that veneer is broken during bankruptcies and other issues (see Celsius).