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.