As for me, it's better not to hold many kind of coins in the wallet, and store them.
At first your wallet may be attacted and there is great risk to loose your money. And secondly, the price of unpopular coins can just fall.
All you use is your wallet or do you just put it on an exchange as well?
I know that it's much safer to leave the coins off an exchange because they are third-party wallet providers.