Since when do banks offer 5-10% interest rate? The most you can get here on timed deposits is 0.03% to 0.10%. I'd rather invest my money on some random coin than deposit it in a bank.
In my country, but if your country only offer 0.03% to 0.10% then it's really suck to invest in banks since you're not earn anything as the value will always decrease due to inflation. I don't think it's good to invest in random coins since the risk is higher than staking stablecoin or invest in Bitcoin.
It is very important to know the credibility of the exchanger we use in order to have some assurance.
Did you refer to Binance? Their assurance only work if the hacker didn't steal the whole Binance money. If the hacker can get the whole money Binance have, their assurance are useless since they need to recover their operational first, not their customers.