Buying because everyone else is buying, selling because everyone else is selling. That's herding, and it happens whether or not you have any private read on the asset. In markets it turns into self-reinforcing cycles that push prices away from any sensible value in both directions.
Crypto is unusually fertile ground for it, and the reasons are structural. Fundamental valuation is hard. When there's no accepted framework for what a token is worth, social proof, meaning what other people are paying, quietly becomes the valuation mechanism. Information asymmetry is also extreme. Insiders and sophisticated players know far more than retail, so following the informed crowd can feel rational even when it isn't. And social media gives everyone a live feed of what others are doing, which turns up the volume on the whole thing.
How the loop actually runs
Crypto herding runs on feedback loops. A price rise pulls attention, so the asset shows up on trending lists and social volume spikes. Attention pulls in buyers who want exposure to the thing that's going up. Those buyers push the price higher, which pulls in more attention. That reflexive loop can carry a price well past anything you could defend on fundamentals before it turns.
The turn uses the same dynamic in reverse. Early sellers create a dip, the dip triggers fear and attention, fear triggers more selling. The way down is usually faster than the way up, because panic moves quicker and hits harder than greed does.
Meme tokens are the pure case
Meme tokens are the cleanest example there is. The value proposition is entirely social. The token is worth whatever the community collectively decides, and there's no fundamental anchor to disagree with. Here herding isn't a bias to correct for, it's the actual mechanism. Getting that straight helps you show up with the right mental model, you're trading social dynamics and not fundamentals, and the right risk parameters, position sizing that assumes the thing can go to zero.
Spotting herding while it's happening comes down to a few signals. Parabolic price action with accelerating volume means people are piling into a position. Funding rates at extremes tell you leveraged traders are all leaning the same way. And sentiment reaching total agreement, where everyone is bullish or everyone is bearish, is a contrarian tell, because it means the herd is fully committed and there's nobody left to be the marginal buyer or seller.
What to actually do with this
Betting against the herd looks profitable on paper and is brutal in practice, mostly because of timing. The crowd can run prices far past what any rational read would predict, and being early feels exactly like being wrong if you can't sit through the drawdown. So I treat herding signals as alerts, not trade signals. When I see extreme herding, the move is to cut position size, not to try to nail the top or bottom.
The best defense I've found is boring. Write the plan before you're in the trade, with entry and exit criteria tied to things you can actually measure. When the pressure to buy or sell is loudest, that plan is the anchor that keeps your decision yours instead of the crowd's. Without one, the default under social pressure is to follow the herd, and we all know how that tends to go. On Blockcircle I lean on funding-rate and sentiment reads for exactly this, less to predict the top and more to know when to size down.