Well if you were to ask me it would be much better to save the money in a bank than investing it. Specially if I'm not in badly need of money but if I'm i typical type of individual who's thinking is to double my money i would definitely try to invest it.
It all depends on the purpose. Saving money in the bank is only good for the purpose of having money aside for when you need it. If you're looking to earn money in a passive way through the interest offered by your bank, then it's peanuts and not worth keeping the money in your bank for. If you calculate everything thoroughly, then saving will result in a negative outcome after tax, decreasing fiat value, etc. Regardless of you being in need of money or not, everyone likes to see his wealth increase, and thus investing your money properly is a must. If I look at myself, I have always been putting my money to work. Before Bitcoin it was mostly stocks that I was interested in (specifically stocks that got dumped down badly). I was happy to see my wealth increase with around 20-50% per year, depending on the frequency of the trades and the level of profits.