I think it depends on the country you leave, in some countries banks pay good interest for your money so there is no risk and sure it is better than saving it
There is always risk including when you leave money in your bank. Tell the guys on Cyprus if there was no risk on leaving your stuff in the bank.
Also, interest rates pay nothing. Unless you are already rich and inherited, I don't see how leaving all of your stuff on the bank is going to benefit you more than it does benefit the bank. While you make peanuts off interest, rich guys can live off bank interest only even if they are single figure %, only because they have so much that it creates a solid passive income.
Banks doesn't pay good rate of interest nowadays so it is better to invest the money at right place and at a right time. And investing in gold or bitcoin is good option at present I mean you need to diversify your investment to minimize the risk factor so even if you have loss in one you can recover it from the other.