According to Eric Balchunas, BTC and ETH buy-and-hold returns from 2017 to now would be approximately +600% and +351%, respectively, source: X post by Eric Balchunas dated Nov 5, 2025. According to Eric Balchunas, the S&P 500 would be up about +186% over the same period, source: X post by Eric Balchunas dated Nov 5, 2025. Using the cited figures, BTC outperformance versus the S&P 500 is roughly 3.2x and ETH about 1.9x, offering a concrete historical performance baseline for long-horizon crypto exposure, source: calculation based on X post by Eric Balchunas dated Nov 5, 2025.