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. Bitcoin can fluctuate rapidly and market volatility might impact your financial stability. It is actually very risky to invest in a single asset. The part that scares me the most is that my friend has put all his resources into this one asset. If am wrong please correct me. Thanks
He's foolish if he left one source of income for another when he could literally have both of them together and have no problems at all. In fact, it would have been even better for him to keep doing his usual business and then use the money he earned from that business to make investments in Bitcoin when the time is right, or even do DCA, in which he wouldn't need the market to get down before he could make a purchase. I would never leave my main source of income only because one of my investments has started to work out, but I would be happy that now I would have two sources of income, and that's what most people strive for these days.
You mentioned that he progressed fast, which means that he probaby invested by the end of the bear market, and the bull run started soon after that, which made him good profit for his investments, but he lacks experience, and knowledge too, probably, and he should have at least spent some time in the market before making that decision, and I'm pretty sure he would carry on with his business along with his Bitcoin investments once he had learned that Bitcoin and the market works in a cyclical pattern, and he might have months or even years without any profit only as an investor.