We talk a lot about business in this thread, but we have overlooked such a thing as cryptocurrencies and working with them. I mean free trading of such assets on a cryptocurrency exchange. I myself studied trading for about a year and was able to put my knowledge into practice with the help of kucoin trading bot. Usually individual traders use additional software in such cases.
Trading crypto is definitely not something you can be sure of because this market is way too unstable, and I think it's better to work with foreign currency. I've been trading forex for a while already, and with this page http://usforexbrokers.com/reviews/interactive-brokers/ , it wasn't a problem for me to find a reliable broker and start profiting.