SCAM
https://cryptonius.com/?a=faq"As previously mentioned, we are the group of professional traders and skilled analysts with valuable experience in the sphere of cryptocurrency. All transactions in the cryptocurrency market are carried out according to an elementary principle: buy at a lower price, sell at a higher. And, vice versa, respectively - sell at a higher price, buy a lower. Due to the variability of the exchange rate, we make a great profit on this difference."
Then
http://cryptodouble.com/faq/"As previously mentioned, we are the group of professional traders and skilled analysts with valuable experience in the sphere of cryptocurrency. All transactions in the cryptocurrency market are carried out according to an elementary principle: buy at a lower price, sell at a higher. And, vice versa, respectively - sell at a higher price, buy a lower. Due to the variability of the exchange rate, we make a great profit on this difference."
DO NOT INVEST LARGE AMOUNT YOU ARE PLAYING WITH FIRE
ONLY VERY SMALL AMOUNT LIKE 100 DOGE THAT YOU GET FROM A FAUCET.
SO YES 100% IT'S A PONZI