Arguably, if that is your goal, you would be better off just buying the coin and hold.
That said, I pre-ordered a couple and am going to do exactly this. At these prices and speed it's more about having fun, and perhaps support the network on some of the smaller coins.
That's my plan. I'm looking at multipool.us to mine the most "profitable" scrypt altcoin. I guess this will be my form of "buy and hold".