There are two possible reasons why people use banks nowadays:
1. Because there isn't any other option;
2. Because they think their money is safe there.
I think you are essentially wrong here, and to prove I simply use myself as an exemple:
There are many "safe" ways to go without a bank, from cash under your pillow, to buying gold for small amounts and investing in infrastructure/productive assets if you have more resources.
The reason why I use the system is:
1. Comfort, while being system-dependent, banks makes the use of fruit of my work easy and has been pretty reliable in my experience. Also there are many perks coming with it, such as checks and balances by institutions (which doesn't happen in block-chain based companies, yet), ability to use credit (again, not a strong topic in the crypto-world, yet) and finally, the fact that it is easy to use.
2. There are many "safe" ways to go without a bank, from cash under your pillow, to buying gold for small amounts and investing in infrastructure/productive assets if you have more resources.
Ultimately the use and price of a currency (even if you speak about fiat or crypto), are defined by the acceptance it has. The actual volatility and lack of checks in cryptos makes it unapplicable to real life, with frauds, hacks and speculative excesses that makes in a terrible choice for a baker, a care seller or a plumber.
The biggest concern of a modern central bank is: Stable currency and Gvt debt management. That's why all countries try to have a small inflation (it is not only to reduce the debt but to induce artificial growth by taking from the fortunate to the socialwelfare system) but stable inflation. Even a country like Switzerland or Norway, which do not need to print money (both governments, for different reasons, make money each year) still want a stable currency and a small inflation. Switzerland makes huge efforts to devalue their money to stay stable and competitive.
In a world in which you can go buy bread at 10am for 2usd then go at 1pm and have to pay 2.5usd then go back at 4pm and have to pay 1.5usd, the administrative cost would be unbearable, and trading of any sort (including the trade of the baker) would be nearly impossible.
Bitcoin has not been created to be a world day-to-day currency, but more a speculative and reserve currency for the people ready to take the ride.
Sad to say, you need governance in a currency for it to be used broadly. The beauty of cryptos is that you can hard-code governance, the ugly part is that a small selection of people will end up by doing so (call it the Fed, call it federated miners..)