Both. To invest you need to have some saved up and it's a bad idea to invest the money you're living on.
If you're really afraid of investing do yourself a favor and don't keep your savings in a bank. Buy a good safe or a piece of land that will work as both a store of value and an investment.
Moreover, if you want safe and sure profit, saving is the best thing you can do, if you are going save bitcoin not the money/cash itself which you are going to save it in the bank. Of course, was the best one to save it then hold it in a long term basis because of the volatility it has.