> (At least in the U.S. Do EU citizens have to report themselves for such transactions?) No, but transactions over X € must be conducted using a traceable medi

> (At least in the U.S. Do EU citizens have to report themselves for such transactions?) No, but transactions over X € must be conducted using a traceable medium - cheques, credit cards, bank transfer, sometimes Bitcoin. X varies by country. Conducting transactions above X € in cash doesn't automatically constitute criminal money laundering, of course, it just gets fined.