I think it's realistic to envisage a world running 100 percent on bitcoin. Fast forward 10 - 20 years from now, everything will be tokenised, including individual workers time. This will significantly diminish the need for all forms of money, be it fiat, Bitcoin or other as the frictionless exchange of tokenised assets including an individuals tokens will be a far more efficient way to exchange value. I expect that The Bitcoin Network (leveraging taproot) will play a role in this alongside a few other distributed platforms. Bitcoin will become the universal measure of value for a disparate set of assets and Lightning will be the means to stream these in real-time.