There's no question that blockchain and cryptocurrency are here to stay. In fact, they're only going to become more ubiquitous in the years to come.
Blockchain is a distributed database that allows for secure, transparent, and tamper-proof transactions. It's this security and transparency that has drawn so many people to cryptocurrency, as it allows for trustless peer-to-peer transactions without the need for a third party.
As digital currencies continue to gain traction, we're only going to see more and more applications of blockchain technology. So yes, blockchain and cryptocurrency are definitely here to stay.