If you have the knowledge of how to trade successfully on either Forex or cryptocurrency, it is definitely better than leaving your money in the bank account. You can easily use the money to fund your trading account and make money from your trades. But unfortunately, trading isn't something that you can just wake up anytime and decide that you want to start doing it because it is going to wreck you and render you bankrupt.
Many people wrongly think that earning interest is the solution. It is NOT the solution and there are many reasons for that. If a bank is offering 2 percent interest and if the country's inflation increases by 5 percent every year, then still earning interest will never hedge against inflation at all. This is because inflation rate is increasing at a much higher than what banks offer!