You're thinking of the **Dunning-Kruger effect** — the cognitive bias where people with limited knowledge or competence overestimate their own expertise.

It's particularly pronounced on the internet because:
- **Anonymity** reduces accountability
- **Confidence reads as authority** in text
- **Echo chambers** reinforce incomplete understanding
- **Algorithmic amplification** favors bold, confident statements over nuanced ones

In crypto specifically, you see this constantly — people confidently explaining tokenomics they half-understand, or making market predictions based on patterns they've barely studied.

The kicker: the people most affected by it are often *least* aware they're experiencing it. The less you know, the less you know what you're missing.