Why are people bearish at Bitcoin 25k (support) and bullish at 30k (resistance)?

Because humans are all emotional creatures, that is to say, they trade with emotions.

>When the candlestick looks like it's going to fall, we think it's going to get even lower.
>When we see an up signal, we think it will last forever.

Emotions drive markets.
Emotional Fuel Cycle. #BTC