I've been using http://doublebitcash.com/ for almost 7 months now and my time there has been awesome. I don't understand how people having problems and saying it's bad but let me tell you my experience and I had no complains whatsoever. http://doublebitcash.com/ doubles up your already existing Bitcoins numbers. I talked to the staff service is great from my experience they reply fast and try to help you best they can. it's amazing. I'd highly recommend http://doublebitcash.com/ If you are a bitcoin user with even 2 bitcoins, you can easily double it in 5-6 days! Just try once. Review about: http://doublebitcash.com/ Reason of review: Good quality.