Today it looks like great deal to buy xxx GH/s machine, but in few months it's gonna be unprofitable.
Exactly.
Maybe you can preorder some scrypt ASICs.
If you can get a hold of a few really early in the game by preordering and waiting, you can probably make tons.
From what I understand about the SCRYPT algorithms, they don't lend themselves to ASIC chips.
Isn't that the entire point of the algorithm to keep miners from having significant advantage with specialized hardware?
It is supposed to be more memory intensive than parallelized computations intensive.
Is there an ASIC provider that claims to produce hardware for SCRYPT crypto?