Lol, good one.

Without in person interactions yes, but there are entire books about law enforcement compromising wallets over time and mapping illicit transactions. Monero was explicitly encrypted to prevent tracking and preserve anonymity. So they banned it in the UK.

Unlikely to be sufficient for any sizeable amount of money.

Nonsense. The moment you try to get it into the regular banking system to spend it you face the same questions of origin.

You may as well say you don't need to spend the cash, you can just leave it in a safe.

Which is what I meant by "you just need a convincing story" and then described the most common method of money laundering.

It is also very difficult to spend a large quantity of cryptocurrency.

I am describing laundering it through a fake business.

With enough handwaving we can pretend they are so new the law isn't clear and dust of scams of ages past in an unregulated space. For a while.

Except the blockchain is an indelible record of transactions. Cash has no clear origin and you just need a convincing story without other evidence that disproves it. This? This is from my cash only business. We're doing great!

I have attended a few in person and enjoyed them.

Ah fuck, I think I forgot a sad fact.