A disclaimer: I am not invested in BitConnect (although I am in a different, what many will undoubtedly perceive as dirty scheme).
After doing some research on BitConnect and a few other up and coming (and more or less successful) HYIP programs, it is hard to disagree that there is a tremendous risk behind them and, likely, they will all go belly up sooner than later. That said, BitConnect has been around for almost a year now, and people made some money, and people keep making money, and it doesn't look like it is going to die tomorrow.
It is clear that it is not the most beautiful or ethical way of making money - you're supporting a system that will eventually hurt its customers, but it works, and if you jump in now, you have a good chance of getting a decent return on your money.
That is, if you are stress-resistant. =)