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 Not every...almost every site.
http://u2cloudmining.winspiral.net
is paying since the start and all is now for free...
users are paid...users are owner of the cash system and it is impossible to lose because you can only earn...
try to lose...it's impossible.
Why should my site run away if every one makes profit?
Now it makes best profit...why should I close it?
I do not understand your mind...If i close it...income is stoped.