The FBI has warned investors of a surge in cryptocurrency scams, with nearly $3.9 billion in losses reported in 2023. Investment fraud remains the most common scheme, often targeting victims via social media, dating apps, and impersonation scams. The agency stresses caution when dealing with unsolicited investment opportunities or unknown contacts. Scammers use high-pressure tactics, fake websites, and fraudulent apps to trick people. The FBI urges victims or potential victims to report any suspicious activities, even if no financial loss has occurred.