Today, Bitcoin (BTC) and Ethereum (ETH) posted weekly losses of 2% and 7%, with more than $1.5 billion in leveraged positions liquidated across crypto markets. Let’s see how bear market starts and how investors can prepare themselves for this kind of downturn. Crypto bear markets follow familiar patterns. Heavy leverage builds during bull runs, only to collapse when prices turn lower. As positions are liquidated, losses cascade across the market.