4. Seek out a Bitcoin ATM.
Depending on the country and the amounts in discussion, these can be a fair option for those keen to stay anonymous, just... they're pricey. The fees are big. Sometimes a bit too big.
Apart from Bitcoin ATMs, there are also physical exchanges that allow for the conversion of cryptocurrency to fiat currency, depending on the country. Some of these exchanges even offer daily transactions without KYC verification for certain amounts, and their fees are generally lower compared to those of ATMs.