Teaching how to invest? I don't recall a single time his investments or trades actually ever turned a profit. A career snake oil salesman is probably the best description I can come up with. What really puzzles me is how many on this site would actually change sides with him if given the choice. Which tells me that the US immigrated many wrong people who should have never been granted refuge in the United States for moral and ethical incompatibility reasons. Most of those individuals curiously hail from Eastern Europe.
He still took his time to teach you how to invest:
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http://www.cnbc.com/2017/07/07/form...li-fund-filed-sec-complaint-against-fund.html
Former officer of Martin Shkreli hedge fund filed SEC complaint against Shkreli while working for fund