It is really hard to get the most accurate answer about ETH. For me, I will buy Bitcoin and buy ETH. Because the most valuable currency and can change my life only Bitcoin. If you keep Bitcoin someday you can earn a lot of money. But if you don't have a lot of money you can only buy ETH and keep in mind where the ETH will return to the same price as 2017 and you can be Millionaire after one night.