Bitcoin is already way to complicated for 80% of the world poulation. It does not make any sense to me how some hardcore nerds are really this far in the digital world, that they think they should invent a second layer payment system that people should then use everyday. This will never catch on, and if it will it is still idiotic.
People said the same thing about Linux during the 90s/2000s, that Linux would never become user-friendly enough to displace Windows and then Android came along with mobile devices... 
How can you be so sure that we won't have a similar innovation/adoption curve with Bitcoin?