You're contacted – usually out of the blue, via social media, Whatsapp, or unsolicited phone call – about an investment offering unusually high returns. It might be foreign exchange trading, cryptocurrency, rare commodities, or a company "about to go public." The scammer builds credibility slowly, may even pay out small "profits" early, then persuades you to put in more. When you try to withdraw, the money is gone.
Pig butchering is a sophisticated variant: scammers spend weeks or months building a relationship before introducing the investment, making victims feel genuinely known and trusted.