Bank investors have more certainty because there capital is completely safe but they give 8-10% annual profits to the investors of per year. But it is comparatively less in terms of profits.
On the other hand you will get constant profits from crypto as if you are experienced in trading then daily profits is possible. Otherwise you can get profits by investing. However crypto investment puts your capital at greater risk (main point).
I prefer buying altcoins rather than bank deposits because altcoins can make me a profit of at least 2-5x my capital compared to deposits, the return is very small, 8-10% every year, considering the very small returns and inflation every year, I'm not interested in putting my money in to deposits, that's why I chose altcoins to invest, but remember, this is just my opinion. Every investment has its own risks, so do your own research before investing.
Better to know the truth and not just blindly listen and follow someone's opinion, I think your reason is valid if you find the place where better understanding is already established, chances to earn from this venue is possible and like what you said x2 or more is really happening with those solid projects who gained decent support from the community.
Do your DYOR on both side of these two types of investment before deciding if which of the two will be fit to the type of your attitude towards your investment belief.