It is better save money on the bank,while the others is i'll put it on invest in bitcoin,you can sure that your money is the value is high.And when you are having a an invest and saving you have more money someday you can buy anything if you want.If you more invest you can invest you'll can get more of the investment you want.
I think you should save money both in banks and bitcoins as banks are safer to save our money but the only drawback is that our money will not grow in future as it can grow in bitcoins and saving money in bitcoins is also an form of investment that can give higher amount of fiat in future when price goes higher.