Once hailed as unhackable, blockchains are now getting hacked
By: Mike Orcutt
Link to the article that is referenced:
These incidents prove that when you build something and claim it is secure, there will be somebody who will immediately take up the challenge and begin to figure out how to break the security. This usually occurs due to complacency and being overly confident. Human behavior and a desire to meet a challenge, not to say the desire for personal gain, is underestimated. Continual diligence is required, despite how secure you feel what you have built is.