Unable to withdraw. Withdrawal requires to pay 20% margin first

The netizens I met on IG were just chatting at first. Later, netizens said that they invested in virtual currency, and they all made money. They hoped that I could invest together so that we could have common topics with him. I kept persuading me to increase my investment so that my profits would increase, and I also promised me that I would transfer Taiwan dollars back to my account. When I wanted to withdraw money, I asked for a 20% deposit for capital verification. I asked netizens Why is this happening? Netizens said that this is a normal phenomenon. If you don’t pay, you can’t withdraw money. It’s a scam. Please help