Speculative theory - - You steal a credit card. - Buy BTC with said credit card. - Use BTC to buy Steam cosmetics that you already own and Steam converts tha

Speculative theory - - You steal a credit card. - Buy BTC with said credit card. - Use BTC to buy Steam cosmetics that you already own and Steam converts that BTC to USD. You now have effectively used a stolen credit card to convert its value to cold hard cash that is not traceable, or at least requires several hoops to jump through to figure out who stole the card.