Yes it's better to invest in Bitcoin, there is a possibility that you earn a lot of money here. But consider your Bitcoin as your fund for emergency purposes I think it is not a good idea. Because you can not change or convert your bitcoin or any kind of coins into real money instantly. In case of emergency you can not encash your money so easily. There is still a process to follow . And what if the time that you need money is the time that the cost of different digital currencies is at the lowest price. You probably have a regret to sell or trade it on the market.... Due to possible losses.