I like, from a geeky perspective, cryptocurrencies. 10 years after Bitcoin was created, I still have my a-ha moments when I encounter some novel use of cryptography and finance, like DeFi, or NFT.

It's good to know I am not the only person in Crypto not focused on the money. Today I spent the whole day working through all the variations of keys that hive has, that was aha moment for the day.