China - advised its state owned backs to not participate in Crypto currency. Related to that your talking about millions of miners or more being brought off the internet to facilitate the blockchain processes
Referencing above article about Elon musk - he makes little to no difference to the hit crypto has taken. Huge financial institutions have sunk money, not to mention lobbying dollars all over the world to get their governments to work on some regulation of blockchain and taxation actvities. Each country is different when it comes to those custodial and crypto to cash conversion.
Yes Elon made giggles about Doge, and he owns the largest assets on that blockchain ledger. Telsa simply did a media tap dance backward on announcing purchasing "these clean auto cars." It will balance out and hell most huge western european scandavian countries have eco-friendly electricity for its miners.
I am doing the same bit by bit to utilize solar and hybrid-grid usage, hell use hydropower.