I think Bitconnect is a scam. But I will not downvote you for this.
Consider the story of pirateat40, then calculate the median yearly gains of bitcoin based on the last 5 years.
You will see that the median yearly gains of btc surpass the proposed btcc payouts for one year.
Also you remain in control of your coins.
It's your money and with 6k of bitcoin you'll be a millionaire by 2022. Without doing a thing.