It sounds like you were targeted by a phishing scam where fraudsters pretended to be from Coinbase, leading to the loss of $4,000 in USDC. These scams often involve fake tech support, remote access, and misleading investment advice.

How the Scam Likely Happened:
Fake Call from “Coinbase Support” – Scammers tricked you into believing your account was compromised.
Directed to Transfer Funds – You were advised to move your crypto to a supposed “safe wallet” or “staking program.”
Funds Stolen – The money never reached its intended destination.
Potential Wallet Compromise—Since you were hacked earlier, it’s possible they attached a tracking or movement address to your account, meaning they could monitor or redirect any future transfers.