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).
Banks do not give us profits, they give us interest earnings below inflation. If you want to hedge against inflation, tie your money to solid currencies with a fixed supply.
Altcoins or banks is a good question... Investing in the right altcoin is always the best option, but it's not an easy task and investing in the wrong altcoin will make us lose all our money and make us regret not putting our money in the bank.