Altcoins Rise 21% Yet Lose Share to Bitcoin Ahead of Fed and Senate Decisions

Glassnode reported that altcoin market capitalization increased by 21% over the last month, while the proportion of altcoins in the combined Bitcoin‑and‑altcoin market dropped by 0.9 percentage points during the past 90 days (data as of Sept. 7). The rise in total crypto capital lifted the entire ladder, but Bitcoin captured the bulk of the upside, leaving higher‑beta tokens largely flat.

Bitcoin’s Recovery Context

Bitcoin has recovered roughly 27% from its August lows near $62,000 and was trading close to $79,000 as of Sept. 15, still below the $83,000‑$86,000 cost‑basis wall identified by Glassnode. About 1.07 million BTC were bought inside that wall, mainly by long‑term holders, creating strong resistance. Glassnode’s True Market Mean sits near $76,600, acting as a floor for the current rally.

Macro Factors at Play

• Economists expect the Federal Reserve to raise rates by 25 bps to a 3.75%‑4% range at the Sept. 16 meeting, with futures pricing roughly 90% odds of a hike.
• The 10‑year Treasury yield briefly touched 5% on Sept. 14, raising the hurdle rate for risk assets.
• Spot Bitcoin ETFs recorded four days of outflows totaling about $463 million (Sept. 8‑11) before seeing $159.9 million of inflows on Sept. 14.

Regulatory Test: The CLARITY Act

The Senate is set to vote on cloture for the CLARITY Act on Sept. 15. The bill aims to clarify SEC and CFTC jurisdiction, expanding CFTC authority over digital commodities while retaining SEC oversight of primary‑market activities. Passage could reduce regulatory uncertainty for altcoins, exchanges, and DeFi platforms.

Potential Outcomes

Two key levers will shape the fourth‑quarter crypto landscape:

1. Monetary policy: A softer, single‑rate hike would support Bitcoin’s push toward the $83,000‑$86,000 zone, offering a better backdrop for altcoins.
2. Regulatory clarity: Advancing cloture on the CLARITY Act could narrow the regulatory discount affecting altcoins, improving liquidity conditions.

If both conditions align, altcoin market share and ETH/BTC ratios could rise, indicating a broader rally. Conversely, a hawkish Fed combined with stalled CLARITY legislation could keep altcoin share suppressed while Bitcoin tests its lower‑range support.