Two day ago I bought some Veritaseum on EtherDelta. Two day later as the VERI to ETH ratio went lower I sold the VERI for ETH and doubled my money. I suggest that after you make that kind of money to put it in your wallet. Never leave you money on an exchange. I say that because I lost some money on Cryptsy.
Here is a video on how to buy Veritaseum with Ethereum on EtherDelta and just do the opposite to sell Veritaseum to Ethereum if you want.