Currently, they can use Coinjoin to obscure the money trail. For complete anonymization, they need a little patience. In the near future, they can buy ZCash.

Currently, they can use Coinjoin to obscure the money trail. For complete anonymization, they need a little patience. In the near future, they can buy ZCash. In the distant future, they can probably move the money into a MimbleWimble based sidechain.