A recent financial downgrade from Susquehanna Financial for AMD stock has raised questions about the viability of companies that are dependent on at least some of their revenue from cryptocurrency mining on GPUs. The obvious players in the field are AMD and NVIDIA, the two largest suppliers of graphics chips that double as compute processors for specific workloads including, AI, machine learning, and cryptocurrency mining for Bitcoin-like alt-coins. The downgrade from the firm is based on information that a company called Bitmain, that I wrote about two months ago, is close to selling a new ASIC to mine today’s most popular cryptocurrency called Ethereum.