Initially, no one believed in the great potential that Bitcoin had, especially since Bitcoin was not yet widely known at that time. You don't need to regret not believing the taxi driver's invitation because opportunities don't come twice, but after seeing the current Bitcoin price, you certainly really want to penetrate the time dimension to meet the taxi driver again.
I don't think it's Satoshi, there's no way he could be a taxi driver with all the skills he has. His genius in creating Bitcoin indicates that he is a person with extensive knowledge, which is why he chose to remain anonymous after successfully creating Bitcoin.