Binance is the top exchange. They aren't going anywhere. They have one of the strictest application/acceptance processes for ICOing on their exchange and they don't just hand out the ICO funds. They get paid out as milestones are achieved and in this way, Binance is partnering with the ICO company and supporting them. I don't think there is anything to worry about. They have over 5,000 applications for ICOs. I learned this in January when I attended the blockchain conference sessions at the Consumers Electronics Show (CES).