According to @StockMarketNerd, a dependable bull‑market litmus test is when investors start downplaying Warren Buffett’s long‑term track record, signaling overheating sentiment and rising overconfidence risk. Source: @StockMarketNerd on X, Nov 15, 2025. Traders can apply this sentiment flag as a risk‑control check during strong rallies by tightening position sizing, curbing leverage, and scrutinizing momentum‑heavy exposures across equities and crypto. Source: @StockMarketNerd on X, Nov 15, 2025. Practical takeaway: treat dismissals of Buffett’s multi‑decade outperformance as a timing and sizing check before adding risk in high‑beta assets, including BTC and ETH, to avoid overconfidence‑driven allocation mistakes. Source: @StockMarketNerd on X, Nov 15, 2025.