I don’t know what Satoshi had in mind when they wrote their paper, but at least today I would view crypto money as complementary currencies rather then a replacement of fiat money. We should create a decentralized economy with a wide range of currencies -fiat and complementary money as well. Whether or not the crypto money will run on blockchains doesn’t matter, but it is one technology that seems to be fit for a lot of use cases to solve payment issues imo.