Isn't it difficult to buy BTC right now that you have to submit data for KYC?
Once your wallet is linked to someone's wallet even if you do it outside a platform then it's linked to someone. And when regulations are tightened, tracing wallets and accounts may just be easy for authorities like IRS that's been trying to crack XMR.
Yup it's almost impossible. Earlier it was possible using tax heavens as exchanges located in these countries even after KYC didn't use to share the details of users with countries even on requisition but now things are different all countries have bilateral agreements with these countries and therefore there can be easy sharing of information in cases of tax thefts, money laundering and other illegal activities. Technically OP would be at too high of risk not only can his such assets be confiscated but a penalty and prosecution depending upon laws and amount can also be initiated.
Even if he used the methods you mentioned it wouldn't be safe anyway. Bitcoin is traceable and sooner or later police intelligence can track the money and discover where it is. Then it becomes really easy to make the inverse way and discover the source of the dirty money. It's funny how criminals think they can use bitcoin for their activities just because the mainstream media keeps spreading new of events like this.
But actually I would say it's even harder to use bitcoin for money laundering than fiat, as it is just paper, not traceable.