It is impossible for them to steal your money. They can't even view your balance.
Proof?I recently switched away from blockchain.info's wallet to a software SPV wallet that is open source and able to be
verified by third parties.
Hello guys, here is my personal view ---
Online wallets are always risky even if it provides maximum security. SPV wallets like as Electrum in offline mode is 100% risk free. So, my opinion is with large amounts you must use Electrum cold storage.