I kinda assumed Bitcoin, since that's where most (almost all?) of the computation is happening.
And if Ethereum gets any significant traction, the ASICs will come. That's pretty much inevitable. Heck, I bet ASIC would be worth the investment even for Argon2d hashes —even though that one was designed for modern stock hardware.
Afaik not all blockchain implementations profit from ASIC hardware, some even actively discourage ASCI use by making ASCI hardware use not efficient, like Monero [1],
could be that Ethererum does something similar.
And if Ethereum gets any significant traction, the ASICs will come. That's pretty much inevitable. Heck, I bet ASIC would be worth the investment even for Argon2d hashes —even though that one was designed for modern stock hardware.