So, what's more probably the altcoin everyone will move to once eth will be not profitable?

Title. I'm new to mining (just set up a small 70 MH/s rig :D) and i'm having fun so far. However, i think everyone knows the difficulty is rising up very high, and if the price won't do the same Eth will not be profitable anymore. So, what do you guys think it will be the next altcoin to mine? Everyone is talking about ZCash and Sia, so ill think it will be Sia :)

Also, is it correct to say that once a large portion of miners will move to another coin, the price of that coin will rose?