Xtrabytes and Safex?
Did a quick search and i would recommend neither.
There is simply just too much risk in investing on altcoins right now. Just take a look at bitcoin dominance percentages. The general populace seems to be more swayed towards bitcoin right now and i don't see how people would be again interested in investing on altcoins when just a year ago almost every altcoin out there turned out to be a scam or a dead-end project.