I still prefer bank because we can't be sure in Bitcoin because what if the price goes down? then the value of your money will goes down as well. That is why it is so important that you have savings in your bank account. But also it is a good thing to put some amount in your Bitcoin because you should consider it as a good investment.
i agree with the fact that people should have some money in a savings account aside for when they need it. but if you just keep the coins in your wallet and the price goes down, it doesn't mean you have lost money, although it may feel like so for some people. you only lose money when you sell your coins for a lower rate than where you bought them for. very simple. basically the same goes up with your coins going up in value. you only get to benefit from the profit when you sell.
