Bitcoin and Monero, Monero by default.
Crown accepts two coins, with Monero as the default.
Crown setting Monero as the default is the correct call and closes the most common privacy slip, which is paying in Bitcoin out of habit. Monero keeps the payment off a readable public ledger.
Use Bitcoin only when a vendor requires it, and do not send straight from an identity-checked exchange. Route through a fresh wallet or swap into Monero first. Deposit addresses generate fresh each time.
Crown Market