Have you ever lost money because of a cryptocurrency ponzi-scheme website?

Well I did lose, but it was just ~$6. I knew something was wrong with the platform. It a ponzi scam so guys who put money when this started earned a lot, because they were able to withdraw the money. It was on eth network 2018 just after the fall of crypto, even my friend earned about $3K by depositing $700. So I deposited $5 and the next evening it was announced to be a ponzi scheme, they earned a lot. Scheme was simple, they were doubling money every week (~5 - 7) days.