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Sorry, I haven't had any experience with Bitconnect. I've have used Bittrex, Kraken, QuadragaCX and Coinbase in the past.

Bitconnect is like a crypto-currency for investment in Bitcoin. It has it's own exchange. After you create an account with them you send BTC to your Bitconnect wallet. Then you exchange BTC with Bitconnect tokens (BCC). You can either keep your tokens or you can lend the dollar value of your BCC to Bitconnect and they will use that fund to trade on Bitcoin volatilities. Based on that they pay you daily interest payments between 0.02% - 2% (the highest was 5%+).
Check these links and let me know if you have any questions:

https://bitconnect.co/learning-center/bitconnect-bitcoin-price-volatility-software

https://bitconnect.co/bitcoin-information/19/investing-in-bitconnect-lending