In my opinion investing in the banks yes it is safe but not good because low interest. Investing gold I guess it's good but still low but crypto, yes it is so risky investing in cryptocurrency but if you pick the top altcoins in the market for sure you can make profit in the future.
Now even deposits in banks are not very safe, because governments in their fight against money laundering have gone so far that in the future, when sending a large amount of money from your bank account, you will need to prove the legitimate sources of this money. If you cannot prove this, you will no longer be able to manage the money from your account. This will only be an additional incentive to use cryptocurrency, especially if the settlements will not go through bank institutions.
In the meantime, we have a choice: a safer investment using the banking system with a small profit, or a more risky investment in cryptocurrency, which can bring a large profit.