Although I'm not saying buy ASICs, I'd like to point out most of the coins though have decided to fork have no definite time (unlike monero) or some might have decided to wait and see. There are few, new CN coins with less market worth - so ASIC owners might suddenly target all those till they decide to fork (until all new CN coins move to updating their algorithms - auto or manual). Since all of them decide to move to smaller coins, their difficulty and profitability will drop. But the time between the ASIC owners get their machine and the fork is unknown. (For eg the Baikal miners should be seen soon, and most of the coins are (hopefully) working on their fork but not before people get their ASIC) So although it seems like initial owners might make some money, but overall I think I'd not go for CN ASIC.