It will be best of you will do both, if you have the funds available better to save fiat and invest some on crypto currency.
It is none other than you who has to decide this thing that which option out of both he has to opt for. I think of investing of money as the best option than any other option but prior to investing, you actually have to save money.
Only then youll be able to invest your money in any kind of business. Investment will actually give you more opportunities for having more money for your better tomorrow.