It is very important for us to have a specific savings fund to invest constantly because this fund can provide you with financial services in your most critical moments and will act as a protection for holding Bitcoin for a long time.
Hold in the long run can give you a benefit and of those are inflation killer, bitcoin just like gold in the long run is up only tho some correction from time to time will occur.
IF you use bitcoin for the investment then using DCA strategy is the best way rather than using lump sump strategy. It would be great if you know basic support and resistance zone so you can buy it when bitcoin price correction is happen.
By using that you need a fund that can be invest constantly. Maybe you can put it on flexible deposit in the bank and buy bitcoin when the times come