Couple of beginner questions. Titan X Maxwell hash rate and ethereum or bitcoin?

[Warsupereme]

Hey,

As you might quess, I am thinking of trying the altcoin mining.
I am not sure what is most profitable but if I am not wrong, the ethereum seems to something to go for? Or should I go for bitcoin? or what is most profitable and hopefully stable so I dont lose all my work on nothing.

I have Titan X Maxwell watercooled and overclocked to 1500Mhz but I really cannot find its realistic hash rate for ethereum or bitcoin?
Also I might win tomorrow another one from ebay so I actually have two of them.

I live in finland and was thinking that machine can mine coins at nights or when I am at work.