Cryptos
22,305
Market Cap
$2.78T -1.7%
24h Vol
$1,011,158,508.37T
Dominance
BTC 59.3% ETH 10.7%
Altcoin Season
No
Season Index
56/100 90D

You’re reading an earlier brief: Issue #8, Sep 18 – Sep 25. Its numbers are as they stood that week. Read the latest brief (#11)

Figures in this issue’s text are unverified. The written analysis cites numbers that do not match this site’s measured data for the week. Rely on “The week in numbers” below, and do not treat any level in the text as measured or as advice.

Weekly Brief Issue #8 Sep 18 – Sep 25 2 min read

Bitcoin rose with the market, but rotation signals stayed incomplete

Published

The brief in 30 seconds

  1. Bitcoin gained 3.7% as total market cap rose 3.5%, while BTC dominance added 0.2 pp to 58.6%.
  2. The 90D Season Index rose 5 points to 56/100, still below the 75 altcoin-season threshold.
  3. Altcoin leadership was selective: 26/50 beat BTC, led by QNT, ONDO and BCH.

The week in numbers

Sep 18 → Sep 25 · measured from this site’s daily snapshots, not written by the model

Season Index · 90D
56/100 +5 pts Season zone starts at 75
BTC dominance
58.3% -0.2 pp Rotation at 42% or less
Bitcoin
$83,923 +3.3% Week on week
Total market cap
$2.89T +3.7% Week on week
Beating BTC · 7D
34/50 68% Of tracked altcoins

What changed

Bitcoin advanced 3.7% to $84,198, broadly matching the total market cap’s 3.5% gain to $2.88T. That is not yet a clean capital-rotation week: BTC dominance increased 0.2 percentage points to 58.6%, moving further from the below-42% rotation condition. The 90D Season Index improved by 5 points to 56/100, showing better relative altcoin participation but remaining below the 75 season threshold. Only 26/50 tracked altcoins beat Bitcoin over seven days, so gains were broad enough to lift the index but not broad enough to establish an altcoin-led tape. Community attention on Bitcoin’s moving-average regime test agrees with the data’s Bitcoin-first leadership, while cycle debates remain unresolved by the still-incomplete rotation readings.

Key insights

  1. The market rose, but Bitcoin kept share

    Bitcoin and total market cap rose at nearly the same weekly pace, yet BTC dominance still increased to 58.6%. That combination points to a market-wide advance without a confirmed transfer of leadership from Bitcoin to altcoins.

  2. Index improvement is not a season signal

    The 90D Season Index climbed to 56/100 after a 5-point gain. It is constructive relative to last week, but it remains below the 75 threshold that defines altcoin season on this tracker.

  3. Relative winners were concentrated

    QNT, ONDO and BCH were the strongest names versus BTC over seven days, while ASTER, RAIN and PUMP were the weakest. With 26/50 tracked alts beating BTC, selection mattered more than a broad altcoin beta trade.

  4. Community debate exceeds the evidence

    Discussion of Bitcoin’s 200-day moving-average regime test fits a week in which Bitcoin retained market share. Historical bull-market duration and cycle-methodology debates have no decisive confirmation in the tracker data, while custody, wallet-security and unconfirmed fund-movement topics are separate from the observed rotation signal.

Scenarios for the week ahead

Bull case

Confirmed if The Season Index reaches 75 and BTC dominance moves below 42%.

That would meet this tracker’s conditions for an altcoin-season regime. It would convert the current improvement in relative breadth into confirmed rotation away from Bitcoin.

Base case

Confirmed if The Season Index holds around 56/100 while BTC dominance remains around 58.6%.

This would describe continued selective altcoin participation without a regime change. Bitcoin would remain the market’s primary leadership signal even as individual alts outperform.

Bear case

Confirmed if BTC dominance rises from 58.6% while fewer than 26/50 tracked altcoins beat Bitcoin.

That would show the recent improvement in altcoin breadth fading as capital concentrates further in Bitcoin. The current partial rotation signal would weaken rather than develop.

Outlook

The week ahead is a test of whether the 5-point rise in the Season Index can continue without another increase in BTC dominance. For now, the data favors a Bitcoin-led market with pockets of altcoin strength, not a completed rotation. Community focus on Bitcoin’s technical regime is consistent with that setup, while cycle narratives need broader altcoin outperformance to gain support from the tracker. Security and custody discussions may affect sentiment, but they do not alter this week’s observed rotation readings.

On the watchlist

MetricLevel that mattersWhy
90D Season Index75This is the tracker’s stated threshold for altcoin season; the current reading is 56/100.
BTC dominanceBelow 42%This is the tracker’s stated rotation condition; dominance is currently 58.6% after rising 0.2 pp.
Tracked alts beating BTCMore than 26/50A sustained increase from the current 26/50 would indicate broader relative participation beyond a small set of winners.
Relative-performance leadershipWhether QNT, ONDO and BCH retain leadership versus BTCThe current advance is selective, and persistence or turnover in these leaders will show whether breadth is strengthening.

Written by a language model from this site’s market snapshots, the week’s community briefings and the linked research. Figures come from the snapshots shown above. Informational only; not investment advice.

More briefs

All 11 issues
  1. Issue #11 · Oct 9 – Oct 16 Bitcoin fell 1.3% as altcoin breadth improved without a rotation signal
  2. Issue #10 · Oct 2 – Oct 9 Altcoin breadth weakened as Bitcoin dominance rose to 59.1%
  3. Issue #9 · Sep 25 – Oct 2 Bitcoin gained share as the Altcoin Season Index rose to 61
  4. Issue #7 · Sep 10 – Sep 17 Season Index falls 12 pts to 37 as Bitcoin dominance slips to 58.2%