I see so many services offering to double, triple and multiple in all possible amounts the coins you put to them. This doesn't sound very convincing to me but some of them are offering the list of blockchain transactions as a proof that coins were credited. Is this pure scam like I think or is there a possibility to realy make some coins? Would like to hear your thoughts and experiences.
Doubling bitcoin was scattered in social media, I don't if this site deceive many subscribers in facebook this is obviously scam. Poor are the people who participate on this sites, its a kind of money waster. you must stay away from this one.
If you check some groups in facebook there's a lot of people spamming their referral links of HYIP sites not knowingly the hidden agenda of it. In the past when I was a newbie, I also joined in some bitcoin doubler hopefully it will be doubled my bitcoin in a short time but it was all scam in the end. And yes it' really waste of money once you will join and invest your money in a ponzi scheme.