Hi I will invest to any idea about earn bitcoin. I would start from 0.1 BTC. If everything will be ok I pay more more money 
I wait for PW
why you will start with 0.1 btc .i will suggest you if you want invest btc at any site then invest not more than 0.001btc . because in the presence time no one site is honest . every site ran away within month . I wait for PW