POW is dying ,there are better technologies around
The proof of work (like ETH or BTC) is dying!,
No justification to spend so much money on expensive GPU's and throw money on power
Therefor the GPU's companies will continue to decline (as well as the POW coins )
There are better technologies around
Take a look at existing POS -proof of stack (like NXT)
or even better new Tech like POT proof of Trust (like RYA)