Bitcoin has failed to reach new all-time highs despite the S&P 500 repeatedly setting records over the same period — a divergence that analysts warn is a structural warning sign. With the S&P now stringing together seven to eight consecutive weeks of gains, the probability of at least a modest pullback is rising, and BTC's lagging position means it could absorb the hit disproportionately.
The dynamic mirrors a familiar pattern from the altcoin market: when Bitcoin rises, it lifts alts, but when it falls, alts get crushed harder. That same relationship now appears to apply one rung up the risk curve — Bitcoin itself plays the role of the higher-beta asset relative to equities. In a risk-off move, BTC tends to get hit harder than the S&P, not less.
For investors who bought altcoins in 2023, 2024, or 2025, the experience has been a slow bleed toward Bitcoin dominance.