As of now mate, Bitcoin price is unstable, sometimes it goes high but sometimes it goes down. Unlike before that it rise continuously. The best thing to do earn profit is to do short term trading in bitcoin. IF you really want to get profit immediately. For example, you invest 20$ in bitcoin and the price of it when you bought is 1$. Then the price of bitcoin increased to 3$, so you have earned already 40$. Then convert in into real money and leave the 20$ then wait for the price again to increase.