10tacle :
I've been watching the resurgence of the crytpocurrrency mining. We had a reprieve from the GPU "gold rush" for several years as miners found out that they could build or buy small ASIC machines that saved big bucks on power bills yet still did the job of older PC GPUs. Well that changed with the latest generation of GPUs. Cryptocurrency is here to stay, love it or hate it (I hate it). We'll be facing this rush again with Nvidia's Volta and AMD's Vega. We PC gamers hate it, but it is good for the GPU manufactures and card vendors moving products and production - helps for a future for PCs.
I don't think mining will continue to be a thing forever, and even this phase may end in a few months. The money has to come from somewhere (where do you think it comes from?), and also specialized machines will be created just like last time with the ASIC machines which should make PC hardware insufficient to offset the electricity cost.
I'm not sure it helps the future of PC's really. Again, it will go in phases and at most should account for an uptick in GPU card sales when it's profitable. Even then, those will FLOOD the market on EBay when people don't need them anymore so overall may not make a huge difference in PC sales.
It IS good for resellers for sure, but probably not good for AMD as people buying new cards will choose NVidia instead if AMD's cards cost too much, though I don't know how much the cheap cards on EBay affect the overall AMD user base. Apparently AMD's user base shrunk in the last phase (2013?).
If cryptocurrency is going to stay around long-term it's going to need better stability and regulation which in turn should eliminate the ability to create money with mining.
I think there's a real chance many countries will end up banning it anyway because it's very useful for criminal transactions.