Então fica a dúvida... qual a sua real intenção aqui?
O cara teve a pachorra de mandar um "me de 10 reais que te mando 20 de volta" e ainda quer oferecer "serviços de seguro" como middleman. É complicado... 
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Once 5 deposits of BTC 0.003 reach the pool and get 1 confirmation, Bitcoin will be send back to one randon winner address.
Winner get 0.015
Lets gamble in this new method, all transactions can be verified on blockchain and winner will be choose live on youtube channel https://www.youtube.com/channel/UCvQZAlrTFcLKw4Shis_r2uQ