The thing is, if he had access to his hard drive at any point in the last 10 years or so he would have sold his Bitcoin long before it was this valuable, like many, many other people who used to own Bitcoin and aren’t currently millionaires. The fact that he lost his hard drive is the only reason it’s actually worth anything.
Machine learning is AI. I think the term you’re looking for is general artificial intelligence, and no one is claiming LLMs fall under that label.