For the earlier few months, the industry caps of Ethereum and Bitcoin have remained virtually similar in measurement. No 1 knows which 1 of them will acquire in the conclude. If SegWit is executed, then the chances are that Bitcoin will emerge as the dominant currency, and Ether will fade in to oblivion. But if some bug is identified with SegWit, or if it can't be activated, then ETH will be having a good shot at the prime position.