Stablecoins are the main pricing mechanism in the cryptocurrency world. Tell me more about Bitcoin when Tesla prices their Model 3 at 1 BTC regardless the marke

Stablecoins are the main pricing mechanism in the cryptocurrency world. Tell me more about Bitcoin when Tesla prices their Model 3 at 1 BTC regardless the market fluctuations (AFAICT, it is currently priced in USD and you can pay with BTC with a floating exchange rate). To decouple from USD (or USDT / USDC), you need to price things (commodities and life-essentials) with "true" cryptocurrencies, no matter it is PoS, PoW or autonomous stablecoins (as oppose to USDT / USDC, which are centrally-controlled).