The earliest research on cryptocurrencies and blockchains was published in 2012 and grew rapidly with the first Bitcoin bubble of 2013. Since then, the research landscape has expanded and now nearly every discipline and topic is represented. The Blockchain Research Network bibliography contains nearly 3000 items. At the same time, anecdotally, the quality of research has risen significantly too.
This short description is an attempt to detail the breadth and depth of cryptocurrency and blockchain research. It will be frequently updated as the field grows and the landscape changes. I invite contributions and feedback.