>why not blacklist coins that have been through a mixer? If you can't mix the coins, you can't launder them. It won't be possible to use Bitcoin for these activ

>why not blacklist coins that have been through a mixer? If you can't mix the coins, you can't launder them. It won't be possible to use Bitcoin for these activities anymore. This would totally eliminate privacy. It would be no different than making HTTPS illegal. It's not just criminals that use privacy technology. Eliminating privacy in money for the sake of eliminating some crime at the margins is giving up the farm to gain a horse. It's making a situation where everyone is subjected to mass-surveillance, and power concentrates to a small politically connected elite that can monitor all private interactions, exponentially more likely to be realized. It's very dangerous to society. https://aeon.co/essays/if-plastic-replaces-cash-much-that-is-good-will-be-lost https://aeon.co/essays/if-plastic-replaces-cash-much-that-is... >There's huge interest in cryptocurrencies and what perhaps they can create in the market place. Now we at MasterCard are not completely comfortable with the idea of cryptocurrencies largely because they go against the whole principle that we've established our business on which is really moving to a world beyond cash and ensuring greater transparency.. If you think about it, cash is a problem for a number of countries. Cash really facilitates anonymity, it facilitates illegal activity, it facilitates tax avoidance and a range of other things that aren't going to drive efficiency in an economy -https://youtu.be/bO4jHXjCXw8?t=2m57s https://youtu.be/bO4jHXjCXw8?t=2m57s >If it's an anonymous transaction, that sounds like a suspicious transaction. Why does somebody need to be anonymous? -http://youtu.be/bO4jHXjCXw8#t=4m12s http://youtu.be/bO4jHXjCXw8#t=4m12s MasterCard SE Asia President on cryptocurrencies and cash