https://minepi.com/

At the risk of appearing to be a cryptobro, I've become more interested in the modern ecosystem. It's no doubt obvious, but they have been fascinating developments since I deliberately stopped following it almost a decade ago.

One of the recent ones is the Pi Network, developed by a team at Stanford. Their white paper is intended for laypeople, which I personally found enjoyable, and it outlines their solution for creating a SCP consensus trust network that organically grows from private individuals, accessed exclusively through mobile devices.

It's a newly minted coin, so as far as value goes, it's approximately 0 USD/EUR/etc right now, but it's interesting to me nonetheless