Michael Saylor, executive chairman of Strategy, rejects proof of reserves due to security risks at Bitcoin 2025 event in Las Vegas.Saylor believes that public wallet data exposure increases cyberattack vulnerability for firms, preferring traditional audits for safety.Strategy holds 576,230 BTC valued at $62.6 billion, making it the largest Bitcoin holder among companies.Crypto industry leans towards proof of reserves post-scandals, but Saylor argues large Bitcoin holders prefer privacy and security over transparency.