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.
I really doubt it can happen so easily. Because to replace fiat itself which already used by all people in the world will need a lot of thing first. Regulation which is we can't get or not it is all depends on government. Give knowledge to people from big market until personal so they know about bitcoin and i don't think there are someone who want to do that job.