There have been many claims like you, but I don't think it's completely true. It's true that our assets can't be completely safe in the bank, but holding crypto doesn't guarantee your absolute safety either. There have been many cases of losing seed phrases due to carelessness or unexpected natural disasters...Saving money for a long time with very low interest rates and also causes our currency to lose value over time. But for bitcoin investment, if we buy at a high price and enter the bear season, our money will lose 60%-80% of its value, and in case you need to use that money urgently, you will regret not depositing it in the bank.
Investing bitcoins is completely controlled by the user and profit or loss and good or bad depends on the user. It's different if we keep it in a bank and whatever happens is because it's under the control of the bank, including the problem of losing its value over time.