If you like to get a job as blockchain developer, not only focus in cryptocurrencies, I recommend you to learn golang, since business blockchains are usually based in Hyperledger projects. It would be also helpful to get a few certifications, there is a good one in edx from The Linux Foundation, you can learn a lot about blockchain in it.

Blockchain for Business Professional Certificate.
https://www.edx.org/professional-certificate/linuxfoundationx-blockchain-for-business