This is a quote from the book "On Zero Confirmation Transactions" by Chris Pacia
...s and the rate of fraud has been negligible.

This doesn’t mean every double spend attempt has been stopped, they haven’t. But we don’t need to stop 100% of double spends ― o
nly enough to remain competitive with credit cards, which currently have fraud rates much higher than Bitcoin. As Shapshift.io CEO, Eric Voorhees put it:

We accep t thousands of zero-conf transactions. We don’t need it to be impossible to double-spend, we just need to mitigate the risk sufficiently to where it can still make business sense. An occasiona...
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