According to @camillionaire_m, optimists make money; traders can operationalize this by adding risk when sentiment turns up using measurable triggers such as the Crypto Fear and Greed Index rebounding from extreme fear, AAII bearish sentiment at extreme levels reverting, and BTC perpetual funding flipping from negative to positive with rising open interest; source: @camillionaire_m; Alternative.me Crypto Fear and Greed Index; American Association of Individual Investors Sentiment Survey; CoinGlass derivatives data. Evidence shows sentiment and trend filters improve entry quality, so use a simple trend confirmation such as price above the 200-day moving average and validate with on-chain realized profit and loss ratios before scaling into BTC and ETH; source: Baker and Wurgler 2006 Journal of Finance; Meb Faber 2006 A Quantitative Approach to Tactical Asset Allocation; Glassnode on-chain metrics.