very careful on the alt coin you trade because more alt coin you see in trading site does not anymore exist.
Yes I've been looking at some of the exchanges and its amazing how many coins get de-activated.
Poloniex On 9/5/2016, the following markets will be delisted: ABY, ADN, BITUSD, CNMT, DAO, DSH, FIBRE, FLT, GAP, GRS, HYP, IFC, LQD, MCN, MINT, MMC, MNTA, PIGGY, PTS, SILK, SWARM, WDC, XC, XCR, XPB, XUSD, YACC
That's 27 coins removed!
Alt-coin trading is actually so scary. I have two coins- Bitcoin and Monero, and just keeping track of those two is almost too much to handle.
Plus, I hope that you don't invest too much into these risky altcoins.