Bitconnect is almost certainly a Ponzi, they have lasted as long as they did because they have a coin reserve of BCC tokens equal to about 50% of the coins when they started. As the price goes up the value of the tokens go up and they use part of there reserve to pay people off. As the site keeps paying and the referrals keep increasing the value of tokens increase. This system can last a long time but not forever, whenever the coin drops they lose larger portions of there coin reserve and they eventually will have to run out. So eventually it will collapse and people will lose a lot of money. Even if you are not invested in Bitconnect it will probably hurt the entire crypto market because it is a multibillion dollar coin disappearing and this will be huge negative news everywhere. Its really a lose lose scenario for everyone.