AMD's Radeon RX 6000 series is not the best choice for crypto mining, with the RX 6900 XT only generating an ETH Hash rate of just over 60 MH/s. However, the company will not be making it any worse as NVIDIA has done with the RTX 3060.
https://www.notebookcheck.net/AMD-confirms-that-it-will-not-follow-NVIDIA-in-limiting-crypto-mining-performance-on-its-Radeon-RX-6000-series-cards.528391.0.html