Take bitcoin for example it went up from 2009 - today from 4 cent to 4400$ so what more proof do you need to realize bitconnect is very legit?
Any proof at all would be a good start.
The price of Bitcoin did indeed go up from zero to $4400. That proves nothing about the legitimacy of BitConnect.
At no point did "Bitcoin" promise any returns. Comparing a decentralized coin like BTC with a centralized company like BitConnect makes no sense, and proves nothing.