If you want to find another gold mine like BNB then take a look at Kyber Network. It's a decent DEX in which Vitalik Buterin is an advisor. Its native token (KNC) is being traded on various exchanges. IDAX is also another worth looking one. However, I don't think that DEXs will become popular in the near future. Seriously lack of volume is a thing but technology are more of concerns. KNC or IDAX can handle a small number of transactions but it's doubtful for them to handle the same amount of Binance's. This requires excelent capabilities of their native blockchains. Remember that even Ethereum was jammed by a small game called CryptoKitties a few years ago.