Liquidity issue. Has nothing to do with the fundamentals of either network or asset. 10 BTC is more than most houses, and it would take you 6% plus 90 days minimum to move a house. And you’re definitely not getting 600k cash for monero within a day, if ever.

You could’ve done it non-KYC if you had more time or found some big OTC plays (likely outside of US jurisdiction), but the issue of moving that amount of money outside of traditional regulations would not be improved by monero.