I’ve heard that Justin Sun wanted to Oikos to run an ieo on his Poloniex exchange. Oikos refused that offer and Sun got offended. He announced that Oikos has “some weak places in their security” and advice investors to stay away from the project.
If that's true things than i think justin sun's have no right to pressure to conduct IEO his own exchange it’s unpair, poloniex is big exchange so that teams cannot afford it may be. OIKOS was up trend but suddenly after this tweet highly affected in the price movement. A lot of investors makes panic sell.