What has happened today is Bitconnect has closed the exchange on their website, and so users flocked to some of the only other exchanges (of dubious reputation, since no reputable exchange wanted to list the BitConnect coin) in order to sell their now-worthless tokens, resulting in losses of around 90% today: https://coinmarketcap.com/currencies/bitconnect/
Many famous Youtubers and other individuals with influence convinced hundreds of people to put their money into BitConnect in order to profit off of referrals, leading to a lot of unfortunate losses and a lot of delusion and misinformation among devoted investors. The general sentiment towards those that lost money due to BitConnect has been a mocking attitude in the cryptocurrency investment communities, as BitConnect has been referred to by many as a blatant ponzi scheme for months.