I just ran the numbers for curiosities sake: The average American spends $20,000 on their credit cards. If credit card fees are 4% and the retailer gives half

I just ran the numbers for curiosities sake: The average American spends $20,000 on their credit cards. If credit card fees are 4% and the retailer gives half back, the customer saves: $400 a year. To save $400, the customer: - Gives up access to credit - Gives up 30 day interest free on purchases - Gives up 1% back rewards ($200) - Gives up fraud protection - Takes on the risk of carrying 'virtual cash' Of course all these services could be built on top of bitcoin, but that's going to cost money and eat into what little saving there already was. I can't see bitcoin working in retail. Maybe for easy currency exchange between people in different countries it'll succeed. Not sure where else.