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.
Bitcoin will be scarce when it is almost touching the maximum supply and the price will be very high.I am now more convinced that bitcoin will be a digital asset not as a payment method, because there is many other coins have lower fees and better in many aspect if we talking about crypto as payment.