Easier user interfaces is how to solve mass adoption. People will see the value when they aren't spending $40 USD on a wire transfer when instead they can transfer money between Bitcoin accounts for pennies (in comparison) - that's just one example. And once it's super ABC to get a crypto-wallet (and doesn't look confusing to newbs because it's all pretty and simple) - once the user interface is so so so easy (like current centralized tech) then mass adoption will happen SO fast! That's my 2 cents. New system replaces old system. Easy. Also, better partnering between tech (much like SuperNet has done).