The need to move such funds anonymously is usually due to illegal activities, money laundering, or at least tax evasion (evasion, not avoidance).

This leaves every average person at the very least, on the hook to pay for those taxes evaded, or lacking the services they would have provided.

If the need is due to criminality beyond tax evasion, every average person suffers the corrosive effect of that criminal activity (e.g., while I'm for most drug legalization, I can't begin to argue that organized criminal drug distribution is anything but a massive destructive tax on society - & in fact, a main point of legalization is to eliminate that corrosive costs of gangs).

So, the average person is definitely worse off with the existence of an ability to move & billions anonymously.

(edit: avoided/evaded)