Having worked in payment systems and also having a reasonable understanding of cryptocurrency, perhaps you could enlighten me as to what the limits are?
Your idea that cryptocurrency would solve your friend’s situation is just plain wrong. It might have solved it for one party, but it does push the fraud risk onto the buyer. If your friend had sold a laptop to an honest buyer, but the laptop died as soon as it left the house, or was of lower spec than advertised, the buyer would have been out of luck.
I’m not sure why you think pointing this out indicates that I’m upset, I can only presume this is tone trolling.
