The recent dropped in eth price might be the increasing of blockchain network that other cryptocurrency has launch which is an enhancing version. This is also why the price decline so rapidly this past weeks. Just my 2cents..
Its all about the belief in the company's future prospect. As cryptocurrency is always moving abnormally, most panickers trader will sell out of impulsive. But long term investor will HODL
There is certainly some threat towards job but to national currencies maybe not. For example, USD is still needed to act as an indicator for any Cryptocurrency for its value.