A friend of mine just got into Bitcoin, lucky for him, his successful. Before he started Bitcoin, he was actually into a good business of selling artwork which wasn't so bad. So he got introduced to Bitcoin and had a quick success. It's actually a good and exciting thing to see someone progress fast like that, but he quit selling artworks and other little businesses that kept him going he stopped, he now depends fully on Bitcoin. Bitcoin is the king no doubt, but From my Point of view I think that depending fully on it might be risky to you financially. I don't recommend anyone to depend solely on Bitcoin or any single asset.
Your advise is taking, perhaps your friend got too carried away by the success you said he made from his first start, however does he got the profit from trading or it was from just a price move after he had just acquired the Bitcoin? I'm curious because if it was trading I wonder how fast he could have understand it to have even decided to stop all the things that sustain him for something he barely starts. Some persons thought that becoming a Bitcoin investor should be enough to leave every other thing they are doing but it isn't a wise thing to do because there wouldn't be another way of income and this could cause a stagnation growth.