I'm going to turn to the senior deputy in a second, but I would certainly agree that even the word “cryptocurrencies” is somewhat misleading. These are not currencies, in the sense that it's very difficult to buy your groceries with a cryptocurrency or to fill up your car.
The other nice feature you'd want in a currency is that its value is fairly stable. The value of these cryptocurrencies is anything but stable.
I'll allow the senior deputy governor to say a few more things on this and give a little more detail.