Bitcoin? It's a well known fact that "proof of work" simply doesn't work on a large scale. Lightening is a hack that compromises security for greater speed.

Bitcoin? It's a well known fact that "proof of work" simply doesn't work on a large scale. Lightening is a hack that compromises security for greater speed. It is not at all clear that the end to end transaction fees using Bitcoin would be less than Visa/Mastercard. Particularly once compliance issues are priced in.