TL;DR: The NFT market has drastically declined since its peak in 2021, with most NFT collections having no value. There's an oversupply of NFTs, leading to a buyer's market, and environmental concerns due to energy consumption. Top NFTs also struggle to maintain value, and the future of NFTs depends on utility and genuine value rather than speculation.
I’m not convinced the yanks had anything in place to deal with that. Look at recent demented presidents.
I believe there’s an act covering presidential disability, dating from long before Reagan, due to a president’s wife having effectively run the country for a couple of years while her husband was too ill to get out of bed. That would probably cover obvious and serious dementia as well. (Not my country, though, so I may have it wrong.) Problem with the recent Republican presidents is that their insanity is plausibly deniable, if your worldview is damaged enough already.