Sell altcoins.
Repeat.
Avoid shitcoins like plague. Shitcoins are for greedy people. There is a 1% chance that shitcoins will double your investment. But don't forget the 99% chance of losing your investment completely.
Rarely alt currencies see any good development. Maybe you can mine or buy some for pump and dump, cough paycoin. Originally sold for $5-10 per coin now pennies on the dollar... Get in first, and sell fast or you'll be holding crap on a stick at the end of the day.