> I think it's fair to say that there are unknown innovations in our future that will drive cryptocurrency adoption
This isn't an argument, it's a statement of faith. Innovations such as what? What innovations? What technology? What is missing from society today that would suddenly make bitcoin useful if it existed? What problem exists preventing people from using bitcoin that would be solved with a new invention?
I believe there are unknown innovations in our future that will drive everyone to adopt my toenail clippings as currency, is that a good enough argument for you to start investing in Anarion's Toenails LTD?
If you asked somebody in 1975, "What is preventing people from making mass utility out of ARPAnet?" they would say "a connection to it". Because that's literally all it took: access. When the internet went public in 1993, Ebay, Amazon, Netscape, Yahoo, Altavista, and Geocities were all founded and seeing substantial usage within months.