I know it's not safe - but sometimes I also think all options have their own risks. For me it's safer to keep some money in a personal safe than in a bank account for whatever reason - but of course some people are more comfortable saving it in a bank account. After all I don't live in any European countries, so paying for something in cash in any amount is fine on my part.
For my perspective prefer cash and using it daily is safer, bank can also collapse tho the case is extremely rare. and usually, happen when there is something people inside who are corrupt or there is a major economic turn.
and also paying in cash maybe still be preferred in any nation.
Tho everything has its own risk including storing money with bitcoin ex. volatility maybe we can make the risk even smaller the example is like diversify the money or we can use the bank but only FDIC can handle the limit after quick google search i found that FDIC has rule "$250,000 per
The standard deposit insurance coverage limit is $250,000 per depositor, per FDIC-insured bank, per ownership category" -
https://www.fdic.gov/resources/deposit-insurance/faqtheoretically, we can deposit in the bank 250K per bank so just open multiple accounts and deposit that FDIC can handle that is 250K per bank.
The reason we are using app like Venmo or PayPal it is because some people think is convenient to do transaction with the app, to reduce the risk that we only deposit a little only for daily transaction and not hold it for long period of time.