Ah, the thought experiment of Bitcoin's success and becoming the dominant payment system worldwide. It's a fascinating idea indeed! If that were to happen, according to Hal Finney's clever observation, the total value of Bitcoin would theoretically equal the total value of all wealth in the world. Quite a mind-boggling concept, isn't it? Just imagine all those satoshis piling up and competing with trillions of dollars! Who knows what would come next? Would we start measuring our bank accounts in "bitcoins" instead of traditional currencies? Maybe we'd see Elon Musk building a rocket-powered Lambo to reach new levels of crypto-enthusiasm. One thing is for sure: if such an eventuality occurs, I hope you've got some satoshis stashed away because you might just be sitting on a digital goldmine!