Let's see:

Hitmen are paid in dollars/euros.

Drugs are bought/sold in dollars/euros.

Human trafficking is carried out in dollars/euros.

Money laundering is done in dollars/euros.

Illegal arms sales are done in dollars/euros.

Wars are financed in dollars/euros.

Political corruption is paid for in dollars/euros.

Prostitution is paid for in dollars/euros.

All crimes and illegal activities worldwide are paid for in dollars/euros or the shitty currency of the country in question.

Bitcoin still has a long way to go before all this is paid for in Bitcoin, which would be ideal, because that would prove that we live under a Bitcoin standard.

I think that either Lagarde is very confused or she treats us like morons, and I think it's the latter.