if the price of bitcoin is still rising.this is the good way to invest your money in bitcoin.instead put your money in bank.more profit in this bitcoin.
And when the price of bitcoin isn't rising and it keeps on falling that's the best time to invest. You know about trading, you should buy when the price is at dip and you can sell when the price increase. Saving your money in the bank only gives you security but there is no movement and big return in your money there. As you invest in bitcoin, you only need to save it and just wait for the price to pump.
Banks are not a good idea to preserve our money because they are not helping us to make our money grow they are just taking care of our money and using those into their own wants like investing those to make money in the stock market and every year we will just expect a small return which is around 1-3%.