I am happy you want to join! Ideally, yes. However, I am someone who considers that the beauty in any new creation relies from the interconnected disciplines - so if you want to use this opportunity to share something that could be also interesting to the field (finance, stem...), that is also fine. Something 100% unrrelated wouldn't be fair for the challenge :)
RE: 100DaysOfBlockchain: #1 - The Challenge and Overview of Blockchain