I sell only those coins in which I'm not sure. So I sell for a big need, if you need money. But in general I keep my crypto-currencies and I think that in the future they will bring a big profit.
Sure, that was my question. Once the coin is profitable, how would you sell in bulk? I can sell it in exchanges in chunks but if I know that the coin can't go beyond lets say $10000, how would I bulk sell it?