Best way to predict the market is to force the market. When you want to buy, spread misinformation and fear. You can do this by using twitter. Or going to a popular forum and telling everyone your autistic brother has predicted a crash.
So this guy here sold his coins and now he forcing the market to sell also, so when price fall he can buy again on the lower price. This economy is made for people who have a lot to make even more. Cause this things can not do some ordinary guy.