There is a limited supply of Bitcoin — 21 million bitcoins. It’s limited. The price of Bitcoin is currently 57K +. Not a lot of people can afford that. When demand increases (as it has with BTC the last year) and supply remains the same, the higher demand leads to higher prices (57K). The scarcity is what attracts millionaires and billionaires. They like when only they can afford something. That’s one reason Micheal Sayer is selling off parts of his company for BTC.

Yes. Bitcoin consumes more energy than Argentina, and why I’ve been mainly buying ETH, it uses less energy for its proof-of-stake.