Buying the shares of a bank is different from saving and investing with the bank. I will totally recommend people buying the shares of a bank, defending how successful the bank is.
Always a good option to have at hand, I do recommend it to anyone starting their shares and stock market ventures.
On the other hand savings are important too, they may not be your major investment but they are needed in times of emergency and therefore ignoring them can be a massive blunder.
Bitcoin is a high risk asset and along with many other assets should be a part of the portfolios of upcoming investors. Its risks need to be understood clearly before investing but only investing in bitcoin is not recommended. I do not recommend altcoins, but the rest of the capital should be divided among traditional assets.