Lesson for people to never trust any service provider or wallets (hardware or software) other than deterministic wallets that could be fully reconstructed from

Lesson for people to never trust any service provider or wallets (hardware or software) other than deterministic wallets that could be fully reconstructed from a phrase. Use any service or exchanges for trading only and then swipe funds back to your deterministic wallet after which destroy it, keeping the phrase printed on paper in the safety deposit box.