For now i am doing nothing, I have bought a few coins when the market went dip down, so i am waiting for the market to make return so that i can sell and make some profit, so for now, I am just doing nothing but waiting....
I also choose the time when the market plummeted to buy the good coin at very low prices then sell out when it increased. Short-term trading is also an option that is quite effective at this time instead of keeping in the long run.