Hello newbie here, I currently have some in BTC, ETH, LTC, and XMR,not much, for start it is....
Dunno why my choice is LTC, but for ETH I can tell you that currency have a lot in background goin on, XMR I support just because it shouldn't be traceable.

Glad to see a fellow XMR supporter here. I know this thread is mostly about profit, but having such a strong ideological backing really helps a coin's stability and long-term viability in my opinion, and considering the amount of features that are going to be added to Monero I think it's still quite cheap.