This is the only way it would possibly be funded.

Let's say governments were honest and never debased currency.  All the productivity improvements would have accrued to the populous, giving individuals more wealth and free time.  In a bitcoin world this would be how it would work.

Think of all the technological improvements in the last 50 years; that has all been harvested (read stolen through inflation) by governments for their own interests.  If we had a normal economy everyone would be working 20 hours a week.  But we don't because our value is stolen from us.  

In short we don't need UBI it's an insulting proposal to begin with.  It basically says a portion of the population is not worth any value to society.  We need hard money and people would live comfortably and create value for the world.