Should the government step in and do something about it? The simplest thing would be do ban mining on PC parts, and order exchanges to delist all the PoW altcoins. If the US and EU would do this, PoW altcoins would be effectively dead.
In my opinion, Proof-of-Work is the most
decentralized and fair mining algorithm because anyone can start expending electricity to support the network at any time without the need of upfront investments. Proof-of-Stake and Delegated PoS are intended rather for wealthy people who want to become even richer.
In 2009-2010, Bitcoin enthusiasts mined BTC coins using their own CPU processors that were available at reasonable prices. Nowadays, smart engineers have built ASICs that have an edge over general-purpose processors, so this computer part is
no longer used in mining.
However, some well-known altcoins are mined using ASIC-resistant algorithms. For example, the anonymous cryptocurrency Monero currently uses the
RandomX algorithm because its team values decentralization highly.
Thus, computer parts (CPUs, GPUs, SSDs) will remain in demand in the future. My guess is that these types of computing power will be
concentrated in a small number of top-rated coins.
I understand the concerns of gamers, researchers and others who are unable to buy modern graphics cards due to the high prices, but I think that delisting all the PoW-based alternative currencies would be a harsh, tough and
anti-democratic government decision.