Of course I know

but thanks for checking.
Bitcoin might be groovy for youngsters and bit-heads, but I'm happily stuck in my ways with good old fashioned cash for ninety-nine percent of my disposable income. I'll use a card for the occasional online payment but for me, having cash in hand – more significantly, handing cash to another person – is a great way of avoiding debt. Touch it, see it go … so much more tangible and educational than e-commerce.
l'm certainly up for crowdfunding and so on towards very rapid opening of source, but I'm not a purist about total openness.