I think the most optimistic outcome for Bitcoin would be to return to its roots, which is to play to the nature of bitcoin as a currency, as the opposite of global fiat currencies, coexisting with global fiat currencies and ready to replace the declining credit of fiat currencies, such as overissued US dollars.
My personal opinion is that Bitcoin cannot (or at least will not be soon) replace fiat currencies and be used as a means of payment.
I think the future of Bitcoin has to do with becoming the largest asset for accumulating value and serving as a guarantor for other financial transactions, for example. Rather Bitcoin can replace gold than any fiat currency.