A bear market is a period of negative price trends in a particular market or asset class. In the context of cryptocurrency, a bear market is characterized by a prolonged period of declining prices across the market. This can be caused by a variety of factors, such as market saturation, regulatory changes, or a loss of investor confidence. During a bear market, investors may experience significant losses, and it can be difficult to make profitable trades. In contrast, a bull market is characterized by a prolonged period of rising prices. Traders and investors tend to adopt different strategies during bear and bull markets.