You are right about Bitcoin specifically, but there is a second market for altcoins which use different PoW algorithms [0]. For a lot of these ASICs are either

You are right about Bitcoin specifically, but there is a second market for altcoins which use different PoW algorithms [0]. For a lot of these ASICs are either not on the market, or not economically feasible, in which cases GPUs still dominate. But most of these markets are very small compared to Bitcoin. [0] https://whattomine.com/ https://whattomine.com/