This types of scam works like chain letter,someone promises that you'll make money if you pay into the scheme these types of frauds or what you call scammers nowadays very popular they send you email ,link messages .Cryptocurrency scams are now a popular way for scammers to trick people into sending money. Beginners or newbies got scammed because they are not aware and think about it people think in a greedy way and they take a wrong decision.I suggest you before doing anything be sure it's not fraud or scam be aware of all these scams. Take knowledge before give your bitcoins to scammers. Don't be trapped. ☺