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.
Everyone always wanted to save money as it is sure as to secure the money for the future. And yes bitcoin is good to save because it will increase its price even if you just keep it in your wallet. But if given a chance I would consider investing after saving emergency funds. As we all know investing is quite risky yet it will give you profit.