https://www.pcgamer.com/what-the-fallout-of-a-cryptocurrency-collapse-might-mean-for-graphics-cards/

After Nvidia's most recent earnings report, investors appear ready to debate the the impact of cryptocurrency miners on Nvidia's bottom line. Seeking Alpha has two opposing viewpoints, the first is the bearish view that says cryptocurrencies are set to implode and that it will drag down Nvidia's stock (AMD apparently being exempt as it's more diversified with CPU and GPU products), and the second takes exception to that and basically says the crypto fear mongering is making a big deal out of a small part of Nvidia's business.

We at PC Gamer are less worried about whether Nvidia, AMD, or Intel make lots of money and are a sound investment, and more interested in getting increasingly powerful computers to run increasingly impressive games. The question for us is, what would happen to Nvidia and AMD if cryptocurrencies suddenly disappeared as a revenue source? Will GPUs suddenly become affordable—and even if cryptos don’t crash, when will we have reasonably priced graphics cards again?