What Is Altseason and Is It Time?
Altseason is a period during which capital flows from Bitcoin into altcoins, leading to rapid price increases and extreme volatility across the entire cryptocurrency market. In September 2025, Altseason is actively underway; this is characterized by a decline in Bitcoin dominance, an increase in altcoin trading volume, and intense institutional interest in Ethereum and other alts.
While Altseason can offer significant profit opportunities, this period is unpredictable, short-lived, and accompanied by high risks. Therefore, conducting thorough research and maintaining secure asset custody—especially for Iranian users and traders on the WEEX exchange—is absolutely essential.
Altseason refers to a short timeframe in which capital shifts from Bitcoin (BTC) to altcoins or alts, resulting in a significant and rapid price increase in most cryptocurrencies. Altseason, also known as Altcoin Season, is marked by extreme growth and high volatility—and is indeed a very suitable time for those who are not solely focused on Bitcoin.
Within a relatively short period—usually a few weeks to a few months—the value of altcoins jumps as investors move their capital from Bitcoin to other cryptocurrencies.
With the start of price increases and the rise of the Altseason index, FOMO also comes into play. This creates a domino effect that pushes altcoin prices to very high levels for a limited time.
What Causes Altseason?
After a significant increase in the price of Bitcoin, its price usually stabilizes and moves within a range for a while.
This situation causes investors to look for more profitable opportunities.
They often exchange their BTC for Ethereum (ETH) and other promising alts, which results in Bitcoin's share of the total market decreasing and Altseason becoming active.
Is the November 2025 Altseason Coming?
At the end of October, the Fear and Greed index was at the level of 29, indicating persistent fear in the market. This sentiment has continued for three consecutive weeks since the liquidation event on October 11. Fear has caused investors to be cautious and enter the market less. The positive news is that most altcoins are now trading in stable price ranges and no new price floors have been set.
With further interest rate cuts by the Federal Reserve, investors may feel more confident in high-risk assets like altcoins—especially at a time when capital is shifting from Bitcoin to the entire cryptocurrency market.
However, based on social media sentiment, it seems a major Altseason will likely not happen this month.
History of Past Altseasons
Previous Altseasons have caused a dramatic increase in the value of many altcoins, with some even experiencing exponential growth in relatively short timeframes.
The 2017-2018 Altseason
This period was driven by a dramatic decline in Bitcoin's market dominance, where this index fell from 86.3% in late 2017 to 38.69% in early 2018. During this same period, the price of Bitcoin fell from its all-time high of over $20,000 to under $6,000.
Altcoin growth coincided with the ICO market boom; many blockchain projects created tokens in 2017 and 2018 to raise capital.
The 2020-2021 Altseason
This Altseason took shape during the COVID-19 pandemic, when retail investors and cryptocurrency enthusiasts were looking for opportunities beyond Bitcoin.
This period included the following events:
The emergence of today's meme coins
The massive growth of Dogecoin and Shiba Inu
The NFT boom
Significant improvement in sentiment within the dApp ecosystem
A decrease in Bitcoin dominance from 70% to 38%
The Altseason index reaching 98 on April 16, 2021
How Do We Know Altseason Has Started?
Identifying the start of Altseason requires a precise understanding of market cycles, trends, and investor behavior—or one can simply check the Altseason index. However, the main problem with this index is its reactive nature; it usually indicates the start of the altcoin season when it is already too late to enter at favorable prices.
Below, we examine a few key signs:
1. Increase in Altcoin Dominance
One of the most important signs of the start of Altseason is the increase in the altcoin share of the total market.
2. Growth in Trading Volume
A sudden increase in altcoin trading volume is one of the main signs of the cycle starting. Increased volume indicates greater activity and investor interest in alts and is usually accompanied by price volatility.
When Will the Next Altseason Be?
Predicting the exact timing of Altseason is challenging because the cryptocurrency market is unpredictable and factors such as:
Regulations
Macroeconomic conditions
Changes in fiscal policy
can influence the timing and duration of Altseason.
One important factor that could trigger the next Altseason is interest rate cuts by the U.S. Federal Reserve. Lower interest rates increase capital flow, as investors look for higher-yielding assets.
How to Make the Most of Altseason?
Research and Portfolio Diversification
Take the time to analyze the best alts.
Diversification reduces risk and increases the chance of profit.
Determining Entry and Exit Timing
Use technical analysis tools such as RSI, support and resistance levels to determine the best entry and exit points.
Early Entry into New Altcoins
Participating in "presale" events can provide the opportunity to enter promising projects at a lower price.
Summary of Key Points
An altcoin is any cryptocurrency other than Bitcoin
Alts have more volatility than BTC
A decrease in Bitcoin dominance triggers Altseason
Altseasons can happen multiple times a year
Alt growth can decrease rapidly
In the last decade, several Altseasons have occurred, all of which started after a decline in Bitcoin dominance; the more severe this decline, the stronger the Altseason. Also, in cryptocurrency cycles, hacking and phishing attacks increase. For example, in the legendary bull market of 2021, the amount of stolen assets increased by 357.2% and reached $0.47 billion.
To buy and trade your altcoins safely and take advantage of future opportunities, register now on the WEEX exchange.
FAQ: Altseason in November 2025
1. What is the Altseason index?
The Altseason index measures the performance of altcoins relative to Bitcoin over 30 or 90-day periods.
2. How to predict Altseason?
By analyzing: BTC dominance, trading volume changes, capital flow, Altseason index, on-chain data
3. What is the Altcoin Season Index chart?
This chart shows the performance of alts relative to Bitcoin over time. An increase in the chart means Altseason.
4. Is Altseason over?
If Bitcoin dominance increases again or alt volume decreases, there is a possibility that Altseason has ended.
5. How long does Altseason usually last?
From a few weeks to a few months.
6. Is Altseason guaranteed?
No.
7. How does Altseason work?
By transferring capital from Bitcoin to altcoins.
8. Top three altcoins in June 2025?
Hyperliquid (HYPE), Virtual Protocols (VIRTUAL), Fartcoin (FARTCOIN)
9. What is Bitcoin dominance during Altseason?
Usually under 54%.
10. What triggers Altseason?
A decrease in Bitcoin dominance and an increase in investment in alts.
11. How to find promising alts?
Launchpads, X trends, on-chain data, and exchange listings.
12. Best exchange for altcoins?
Binance, KuCoin, Kraken, and also WEEX for Iranian users.
13. What triggers Altseason?
Bitcoin price stability, positive news, project development, and interest rate cuts.
14. How to identify Altseason?
When more than 75% of alts perform better than BTC.
15. Why do altcoins grow?
Increased demand, good news, and listings.
16. Which altcoin will have explosive growth in November 2025?
AI altcoins, meme coins, and Layer 1 alts have more potential.
Disclaimer
WEEX and its affiliates provide digital asset exchange services, including derivatives and margin trading, only in permitted jurisdictions and to eligible users. All content is for informational purposes only and does not constitute financial advice—consult an independent advisor before trading. Cryptocurrency trading carries high risk and may result in the total loss of capital. By using WEEX services, you accept all risks and relevant terms. Never invest more than you can afford to lose. For more details, refer to our Terms of Use and Risk Disclosure.
