Yes, cryptocurrency as a general concept is here for the long haul because decentralized applications cannot be taken down by an authoritarian power like a government or company. The ability to persist, be uncensored, unregulated, secure, immutable, and trustless is power that humanity has been trying to create for thousands of years. Cryptocurrency enables all of this and more.

Specific cryptocurrencies may or may not make it in the long run, but blockchain technology will be as fundamental as databases, search engines, sorting algorithms, and other fundamental paradigms.