According to @CoinMarketCap, Capriole founder Charles Edwards warned that Bitcoin (BTC) could fall well below $50,000 if the network does not develop quantum resistance by 2028 and urged the industry to move quickly in 2026; source: CoinMarketCap on X, Dec 18, 2025. For traders, this sets a defined 2026–2028 risk window and a $50,000 downside reference to guide spot exposure, options hedges, and monitoring of basis/funding, based on the same source. If visible progress on quantum-resistant upgrades lags into 2026, markets may begin pricing higher tail-risk premiums in BTC volatility and skew, consistent with the source’s warning about urgency in 2026.