That makes no difference to the conversation in hand. What parent is saying that unlike other purchases with credit cards, you can't really do much about crypt

That makes no difference to the conversation in hand. What parent is saying that unlike other purchases with credit cards, you can't really do much about cryptocurrencies. For instance if you purchased a physical product, in case of a problem (like fraud or something), at least you can go to the place where the delivery of the physical product happened and find it. Similarly in case of a digital good (like ebook or pdf, since it's mostly copied from one destination to the other) if the product wasn't delivered, then it can be redelivered with no cost to the producer. It's the first time we are encountering a digital good with non-duplicability of physical world goods with hard tracability of cash.