Some signs of WhatsApp scams include: Unsolicited messages from unknown numbers. Do a quick Google search to verify that the number the message was sent from matches who they're claiming to be. You might find that number is not associated with the company or agency that the sender claims to represent.

They'll promise free cash or cryptocurrency, but free money promises are always fake. Scammers make big claims without details or explanations. No matter what the investment, find out how it works and ask questions about where your money is going.

OneCoin marketed a fraudulent cryptocurrency to unsuspecting investors all over the world. "As a founder and leader of OneCoin, Karl Sebastian Greenwood operated one of the largest fraud schemes ever perpetrated.