Scammer told me to invest £400, told me he was a forex trader and would place a trade for me that would generate over £4.5k I found him on MoStacks Snapchat story. MoStack is one of the biggest rap artists in the UK. Its a shame, I have lost respect for MoStack after being scammed by someone he listed on his Snapchat. After sending the £400 via bank transfer he told me send another £200. Then he said he placed the trade and said to send him £200 via bitcoin as he was going to send me the £4.5k profit via bitcoin and he needed me to send money to his bitcoin account because that was the only way he could send me money back. After sending him that money he said the funds had been lost because I didn't "add a reference when sending the bitcoin" and said send more money. At this point I knew it was a scam and have contacted my bank and the police. I had a feeling it was a scam when I initially sent him £400 and he asked for another £200 but I didn't think anything of it as I found this guy on the Snapchat of a famous rapper in the UK. I'm upset and disappointed. I am a student and was just trying to make some money. I was scammed £800. I will never make this mistake again. Please make sure no one makes the same mistake as me.