After studying blockchain for a while, I decided to apply for the Blockchain Training Alliance (BTA) Certified Blockchain Security Professional Certification, CBSP for short.

The exam covers the basics of blockchain consensus algorithms, advanced blockchain security mechanisms (permissioned blockchains, checkpointing, multisignatures, ring signatures, stealth transactions, confidential transactions, zero-knowledge proofs and Pedersen commitments), network-level attacks (51% attack, Eclipse attack, Replay attacks, Routing attacks, Sybil attacks, DOS attacks), system-level vulnerabilities and smart contract vulnerabilities among other topics.

Overall good review of blockchain security applied to business environments and a certification worth to achieve if you plan to work around this area.

More info about this training and certification: https://blockchaintrainingalliance.com/pages/blockchain-certification