We struggled with this exact challenge for months before discovering the OTC desk at Paybis Corporate. The difference in execution quality is night and day compared to public exchanges. Here's why we've standardized all our large trades through them: First, their liquidity network is unparalleled. When we needed to execute a $1.8M BTC trade last quarter, their desk sourced counterparties across three different liquidity pools to minimize market impact. We achieved just 0.25% spread - compare that to the 1.2%+ we were seeing trying to execute that size on spot exchanges.