Are you trying to buy BTC with XMR? Or, Buy XMR with BTC? Your two sentences contradict themselves so it's hard to understand what you want.

"P2P XMR/BTC swaps are fascinating, but liquidity concerns me—especially after reading how concentrated Bitcoin holdings are becoming. Strategy's $64B BTC bet highlights counterparty risks even in 'decentralized' markets. The filings show how large positions distort market behavior. https://the...

Why not a swap service?