Yes, except there are ways to launder bitcoins. Put them through a tumbler, use them to buy something, gamble with them and withdraw later, put them in a wallet

Yes, except there are ways to launder bitcoins. Put them through a tumbler, use them to buy something, gamble with them and withdraw later, put them in a wallet service and transfer them around (wallets may move bitcoins around, they're probably not wherever they were originally sent), etc. You can definitely see the first step, but after that it's tricky.