In 2021, Patrícia Estevão gathered some very thorough research on how people use and perceive bitcoin, via live interviews from participants all around the world. Her findings, especially the personas she created, can be very useful for guiding projects. More below...
Read the full 14,000 word report. It's absolutely worth it, not only for the findings, but also the process.

Bitcoin UX Research
This research is meant to provide in-depth qualitative knowledge of how people use or perceive Bitcoin. By doing so, we hope that solution creators...
The Bitcoin Design Guide includes a summary for the personas for quick reference by designers and builders.

Bitcoin Design
User personas
How to use bitcoin user personas to build better products, including several bitcoin-specific personas
And if you'd like to put your feet up and watch a video, here's the presentation by Patricia herself.
It can be hard to put ourselves in the minds and contexts of the people we design and build for. Luckily we have UX researchers to help us with that.