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Some instances believe tracing is a thing. For example HM Revenue & Customs is ready to bail out 100K£ for anyone who can come up with a tool that fulfils these objectives:
Provision of a tool that will support intelligence gathering methods to identify and cluster Cryptoasset transactions into linked transactions and identify those linked to Cryptoasset service providers.
Specifically, they ask the tool to, amongst other:
Provision of a tool that will support intelligence gathering methods to identify and cluster Cryptoasset transactions into linked transactions and identify those linked to Cryptoasset service providers.
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3.1.1 Attribution of a cluster/address to a known commercial entity (exchange) or a known service provider (mixing service, gambling service, dark market, etc)
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3.1.2 The ability to track and trace, and for the tool to maintain this capability following any forks or other underlying currency change, for the following Cryptoassets as a minimum:-
Etherium
Etherium Classic
Bitcoin
Bitcoin Cash
Ripple
Tether
Litecoin
Preferable requirement - plans to develop capability for Monero, Zcash, Dash
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Therefore, backtracking to service providers who the can try to push to reveal personal Id information tied to those TXs and amounts.
https://www.contractsfinder.service.gov.uk/Notice/ec88ae4b-4f4c-4926-982a-723636cf2f82?p=1