[bserge]

PayPal and other pseudo currencies already did, for a while. You bought virtual currency (which PayPal was at first, and so was e-gold, webmoney, etc) and traded that for anything you could.

Then PayPal wanted to go big, other virtual currencies were caught in fraud scandals of their own (not their users'), people just lost trust and interest when card processing became more common.

Some are still around but sellers can't be arsed to use them. Maybe they will, once again.