A bull market describes a sustained period of rising prices, not just one green day, but a genuine trend with higher highs and higher lows persisting over weeks or months. In crypto specifically, bull markets tend to be broad: when Bitcoin trends up strongly, most of the market usually trends with it, though not all coins participate equally.
For systematic trading, a bull regime is where trend-following and momentum strategies (buying strength, riding breakouts) tend to have their best conditions. There's a real, sustained direction to capture, and pullbacks tend to be bought rather than becoming full reversals.
It's also, historically, where over-leveraged and poorly-risk-managed accounts do fine right up until the regime changes, which is the core argument for regime-aware position sizing rather than static leverage regardless of conditions.
Educational content, not investment advice. zengtrade is paper-first and non-custodial.