Up in the air: Bitcoin is Ponzi scheme, fake internet money, googled doge once
Surface level: mindless speculation, looks fun, download app, buy 20 £$€.
Solid grounding: over two dozen hours of lectures/articles/podcasts, resists talking about it
Dug deep: has mined, thinks in cycles not in weeks, fiat hatred grows academically, various handles
Bunkered: 125% in, ramen costs 300 Satoshis, borrows against themself, anon
Core: Satoshi level transcendence [no information about this stage available]