I suppose any of the Faang companies could sacrifice a data center for a day or two to do the same. Just crash the currency and get out, to eliminate proof of work currencies.
And there's plenty of reasons to want to do so: Proof-of-work currencies are what make ransomware payments possible, and there's a large daily CO2 cost for proof of work currencies. The question is simply when is the cost of the externalities greater than the cost of acting?
So short term: having the high prices paid by crypto people is nice. But it destroys their relationship to their old customer base. Depending on where the crypto market will be in 5, 10, 15 years, this can be the 5x of their market cap or the 0.2x
[0]: https://www.crowdstrike.com/cybersecurity-101/ransomware/his...