A crypto bull run, in its simplest definition, is a sustained period of significant price increases across the cryptocurrency market. It’s characterized by widespread optimism, heightened investor enthusiasm, and a feeling that the market is unstoppable. While pinpointing the exact start and end dates of a bull run can be tricky, they are generally recognized by a substantial and consistent upward trajectory in the prices of major cryptocurrencies like Bitcoin and Ethereum, as well as numerous altcoins.