Where else are you going to store your money mate I suggest going double ways or dividing according to your risk management Crypto still require fiat onramps and thats why banks are required and basically crypto is not mainstream yet or maybe buy some gold if you are curious Wealth can be stored in various ways Make your decision
Technically, it is not safe to keep money in the bank because we have some countries where citizen funds were used for something, seized by the government despite the fund being something that involves no illicit activities. Besides, before you can withdraw some huge funds the bank will ask you to go through some papers where they know you're the owner of the account, and the money is used to enrich the bank while they provide the owner with little or interest.
Having said that, most billionaires and Millionaires don't keep that money in the bank, they let it work for them or change it into gold.