Just been looking at why the crypto market tends to sell off so hard when Bitcoin stumbles. Turns out it's not usually one headline that does it - it's leverage unwinding. When BTC dropped hard recently, it triggered a cascade of forced liquidations. We're talking roughly $237 million in BTC longs getting wiped out in a single day. Over a week? That number jumped to $2.16 billion. Over a month? More than $4.4 billion. That's the real story behind why markets crash like this.

What's interesting is how this spreads. Once liquidations start, they create market sell orders that push prices lower, which triggers more liquidations. It's a vicious cycle. Bitcoin dominates the derivatives market, so when leverage gets cleared there, it spills into altcoins as traders cut risk across the board. You see BNB, Solana, XRP all getting hit because traders are derisking everything at once.

The bigger picture on why crypto market downturns happen: it's usually a combination of leverage clearing plus a wider risk-off mood. When you've got billions in open interest unwinding over weeks, not just hours, that's when you get real stress. Understanding why the market moves this way helps explain a lot of what we see. It's rarely panic from one event - it's the result of structural forces building up.