It really wasn't blockchain 5 years ago. It was blockchain 6 years ago (though to a much lesser degree, and focused on different iterations of the distributed

It really wasn't blockchain 5 years ago. It was blockchain 6 years ago (though to a much lesser degree, and focused on different iterations of the distributed ledger idea). Then it was really blockchain 2 years ago (but focused on protocols built on smart-contract-enabled blockchains). Interestingly, those two targets are completely different. 6 years ago the application was the ledger, and the language was usually C, 2 years ago the application was "a financial product built to run on a resource-constrained virtual machine that executes a custom language (or Rust)". The demand follows the money, so if the whole space experiences another "bull run" there will be lots of demand for "blockchain" again, and I'm sure the actual associated skills expected will be different as well