People using Bitcoin to move funds around thinking that if they've used a mixer then they are anonymous. They will be sad to later find out that all those mixers were compromised by meta data and/or infiltration. Bitcoin is a trap laid to entrap those who are easily duped on the technological capabilities. The only known technology that might be anonymous is Monero, but there are several problems to avoid: a) Monero allows overlapping rings, so via combinatorial analysis, your anonymity might be unmasked, especially if the rings were Sybil attacked, and b) your IP address was traceable across mixes. The mitigating actions are to mix Monero numerous times (other mixers can be infiltrated so don't use them!), and to not rely on I2P nor Tor, instead use an entirely virgin device that you never use for non-anonymous Internet activity and connect over an unregistered WiFi connection and far from your normal place of residence or work. And don't bring your smart phone nor GPS tracked vehicle with you while accessing the remote unregistered WiFi hotspot.

https://www.armstrongeconomics.com/world-news/g20-blames-your-psychological-problems-for-their-failure/

    “The G20 reiterates the high priority it attaches to financial transparency and effective implementation of the standards on transparency by all, in particular with regard to the beneficial ownership of legal persons and legal arrangements.  Improving the transparency of the beneficial ownership of legal persons and legal arrangements is vital to protect the integrity of the international financial system, and to prevent misuse of these entities and arrangements for corruption, tax evasion, terrorist financing and money laundering.

    The G20 reiterates that it is essential that all countries and jurisdictions fully implement the FATF standards on transparency and beneficial ownership of legal persons and legal arrangements and we express our determination to lead by example in this regard.   We particularly stress the importance of countries and jurisdictions improving the availability of beneficial ownership information to, and its international exchange between, competent authorities for the purposes of tackling tax evasion, terrorist financing and money laundering. We ask the FATF and the Global Forum on Transparency and Exchange of Information for Tax Purposes to make initial proposals by our October meeting on ways to improve the implementation of the international standards on transparency, including on the availability of beneficial ownership information, and its international exchange.”