but come to think of it, those little amount of money that you want to be keeping as savings why not use it and invest in BTC continuously becaus that money you want to keep as savings can also be called your (discretionary income) rather than keeping it in a bank as savings which will not bring you profit in return, why not use the money and be buying BTC and hold it for long period of time, no money is too small to be invest.
Investment into Bitcoin is good, but you should understand that Bitcoin should be approached with discretionary income, that is stationary money since investing with funds that would be in use anytime soon can lead to short living your investment. Investing cold money into BTC can hedge your funds from inflation that reduces the buying power of Fiat considerably, and it can give you good returns if you go for long-term. Bitcoin is a good investment and a profitable one when approached with a long-term holding plan.