During a time of conflict, Russian oligarchs were able to get their money where it was needed -- to their yachts and mistresses.

They revolutionised money laundering.

Depends on where do you live and what access to mainstream banking you have. Nowadays about 95% of money I spend goes through crypto, and honestly, I don't want to go back.

What are your circumstances?

Ordering drugs online.

A financial system for illegal transactions.