For me it is better to save money for an emergency matter but in contrary it is better to invest it for your future so it will grow when time fly by

If i really had some money and i wanted to keep them for an emergency, i would of course consider bitcoin for that matter too. I would keep my funds in bitcoin so that i had savings as well as some profit with the time as the price keeps moving in long term and we have seen this since bitcoin is in the market.
I like this idea but I think it is a better idea to keep cash when it comes to an emergency fund, bitcoin is great but unless you can pay your emergencies with bitcoin then you are going to have to convert it to fiat, and when it comes to emergencies time is key so keeping cash in this particular scenario seems a superior alternative.