you need to make sure your connection is private, scan your pc before doing any transactions with bitcoin (including opening the wallet itself), make sure the address you are sending your coins to is correct and the fee of transaction (cause the speed of transactions depend on this fee, the higher the fee the faster the transaction). unfortunately, this fraud situation is the result of crypto's popularity. Cause lots of people want to earn some profit, but they don't know the details of how this crypto world works. so let's be attentive, safety of our money is in our hands only