Investing and getting returns to meet ends? Not at all. Trading is one thing which can help him but for that also you have to be a professional trader. Otherwise it's a very time consuming process and just like any other normal job. You cannot just start investing tomorrow and expect crypto to become your livelihood in a sudden span of time. Infact crypto markets can go very down from the tops which will take away your very own principal also for once forget about the gains on that.