I'd just like to point a few claimed "facts" to keep this thread from going into too many divergent conjectures (of course we don't have any proof) :

1. Their trading bot is supposed to be trading BTC against USD and USD against other FIAT and doesn't operate on their own exchange as is stated on their trading bot announcement page:
            https://bitconnect.co/system-news/21/good-news-for-bitcoiners-who-loves-the-profit-the-bitconnect-price-volatility-software-in-place

2. They have a built-in anti-crisis protection system (volatility based circuit breaker):
            https://bitconnect.co/bitcoin-information/27/what-is-volatility-based-circuit-breaker

3. The crazy compound interest calculations often forget to take into account that:
- Each reinvestment is a new one (it doesn't add to the previous one)
- Each reinvestment is locked down for a predetermined numbers of day so that most of the wealth remains mostly virtual and the only "guaranty" is a variable daily interest earning based on your total investment.

Most Ponzi are only revealed in major crisis situations when too many people start selling at the same time but as long as this doesn't happen the Ponzi is a very successful operation that can last for many years...