The user invested $1,000 with a trader named David O. Nelson on the website MajorfxHawk.The trader promised $40,000 in profits within 5 days but asked for a $4,000 upgrade fee before granting access.The investment has now earned $80,000, but the trader claims there is a Withdrawal Mempool tax of $4,000 to be paid before accessing the funds.The user suspects this to be a scam and seeks advice from experienced traders.