The truth is that I don't think it was an American invention, I know they are very talented and intelligent, but they are not that kind, I think they are a little selfish with the knowledge they have acquired, I think it is rather invented through a group of people from all over the world who called themselves Satoshi, and if it's just one person I don't really think he was from the US, by nature they're not like that, if there isn't something in return I totally doubt it.