Maybe no one has seen thir tading bot but dthat doesn't mean they are a myth, there are trading bots like gunbot that makes upwards of 2% daily, they dont garanty any returns but it avreges out about 1% a day which makes sence and they have thir own curency that is almost top 10 market cap unlike other wesites like mirohash which was paying up to 16% a day which is unsastainable and they only lasted 30 days, bitconnect has been around for more than a year.