you could have bought 645.16 ETC at 0.00155 and sold today for 0.00188 and make 1.212BTC (20% profit in one day)
or a 40% profit in Gulden and the list goes on.
and as you can see many of these coins are coins that seemed dead at first and after the rise people are going to start suggesting them not before it.
so you should find these on your own.
Yea, because trading activity is high risk, so we must make decission and analysis by our self. We must have clear rules for trading altcoins or trading bitcoins and it is not easy. Needs much data for making prediction.