[aleph_minus_one]

> The irreversibility of crypto transactions means that you have to have some trust that the person you're dealing with will be willing to make things right when erroneous transactions happen.

The cypherpunk answer to this dilemma is that revertability of transactions under some circumstances is a service that, if it is desired (for quite some applications of cryptocurrencies, it is), should be build in a layer above the "bare-metal" blockchain.