This is about payments not bitcoin but there is a synergy of efforts. Bitcoin may be an beneficiary but cryptocurrencies need to "grow up" and have standards. W3C Web Payments is committed to help provide the standards so potential future payment technologies can mature.
The beneficiaries we are the targeting are the unbanked, unbankable, and those not having access to financial infrastructure. We cant achieve this goal without integrating into the core of the browser technologies layered with security to create frictionless & borderless payments. We will help connect up another billion+ people to the global economy.
No offense, but I've been watching the W3C since the days of HTML 3 and your track record of creating successful web standards has been... mixed.
It's not obviously apparent that a W3C Web Payments standard would be useful or relevant.
Plus, I don't much like being told to "grow up." It's possible to tell me respectfully what you think is in it for me without calling me names should I choose to not do things your way!