believe me this will not last for  1 week,,it will scam all who transfer btc..all DOUBLER SITE ARE SCAMMERS..HOW CAN THEY DOUBLE OTHER BTC? THEY ONLY COLLECT BTC IN THEIR OWN STRATEGY..WHEN THE COLLECTED BTC IS ENOUGH TO FILL THEIR WALLET THEY WILL NOT PAY THE SUBSEQUENT INVESTOR..THEY LET THE SITE UP OR THEY WILL SHUT IT DOWN..SUPPORT 24HRS IS NOT ALSO TRUE..THEY WILL NOT REPLY TO YOU IF YOU ASK FOR PAYMENT..THEY WILL REPLY TO YOU HERE IN FORUM WHEN ARE IN STARTING PHASE..PEOPLE WHO INVEST IN DOUBLER SITE I CALL THEM " FOOLING MYSELF" dont fool yourself..DO NOT INVEST..