90% of altcoin traders lose to Bitcoin. Here's the 3-step trap — and how to escape it. Step 1: You chase altcoin pumps. SOL, AVAX, ETH — all look like easy 5x plays. But you're not measuring in dollars. You're measuring in BTC. Your altcoin up 40%? If Bitcoin ran 80%, you lost. That's underperforming on a BTC basis — most traders never track this. Step 2: You hold through the drawdown. In a bear c…