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The article was posted here on BTC TALK last year. Unfortunately I dont remember the title. The reason I am looking for it is because it was a study by the UK government. I would like to refer to it especially when talking to individuals that supports governments. The study was agreeing that there are more crimes with fiat than with bitcoin/crypto in general.
It seems that fiat is indeed one of the targets for money laundering because it does seem easy. For bitcoin requires a lot of knowledge about it, must have skills in the field of technology if you want to do it.