In the volatile world of cryptocurrencies, the term 'bear market' is often mentioned, but few new investors truly understand its implications. Many entered the market in 2020-2021, or in 2024-2025, periods of euphoric rises, and have not experienced the intense bearish phases that have marked the history of cryptos. This article, inspired by a detailed thread on X (formerly Twitter), aims to demystify what a true bear market is, its consequences on prices, projects, and investor psychology, while providing advice on how to prepare for it.