There are lots of scammers online (e.g. whatsapp, telegram, etc) promise you a super high return within one week or so. Never believe any of them because once you send your BTC to them, you will never see your money back to you. Simple as that. They are not account managers but crypto robbers. That's who they really are. I myself have been scammed multiple times because of ignorance in the past. Good and painful lessons learned.