Going to be better to invest it simply because at the bank or as your money sits anywhere beside investing you're money is actually losing worth due to the inflation rate, which the government says is around 2 percent. So, you're going to be losing 2 percent of whatever you have in the bank PER YEAR if you decide to not invest.
Attempt to invest and make around 5-8 percent in stocks and a mixture of safer bonds, that's a usual amount that someone could make in the stock market per year.
This will never be an easy choise since at crypto world all can happen, you can invest and loose part of your coins as you can invest and make a huge ammount of bitcoin as profit, while saving will be based into the value of the coin being bitcoin or another.
OP is really just talking about money in general, you could easily see that when he says SAVE MONEY OR INVEST IT.