Altcoin Season Incoming? BTC Dominance Signals Repeat Pattern
A rare MACD crossover on BTC dominance hints at a potential altcoin season, echoing 2017 and 2021 patterns.

- MACD crossover seen only in 2017, 2021 reappears
- Signals potential surge in altcoin performance
- BTC dominance weakening opens altcoin opportunities
Crypto analysts are buzzing about a rare technical signal on the BTC dominance chart — the MACD crossover — which has only occurred twice in the past: once in 2017 and again in 2021. Both times, this crossover preceded historic altcoin seasons, where altcoins significantly outperformed Bitcoin.
Now, in mid-2025, that same MACD bearish crossover is flashing again. Traders and analysts alike are interpreting this as a possible indicator that the market may soon favor altcoins, similar to those past explosive cycles.
Why BTC Dominance Matters
BTC dominance measures the ratio of Bitcoin’s market cap relative to the total crypto market. When BTC dominance declines, it generally means that altcoins are gaining traction and outperforming Bitcoin in terms of growth.
The current bearish MACD cross is a sign that Bitcoin’s dominance may continue to drop, just as it did before altcoins skyrocketed in earlier bull runs. This suggests a redistribution of capital from Bitcoin into other crypto assets, which historically has led to powerful rallies across altcoins like Ethereum, Solana, and newer layer 1s and DeFi tokens.
Altcoins Could Be Next in Line
Traders watching this pattern believe the market could be gearing up for another altcoin boom, and that now may be a prime time to pay closer attention to emerging altcoins. The MACD signal isn’t a guarantee, but its historical accuracy has been notable.
It’s a reminder that while Bitcoin remains the king of crypto, dominance shifts often give altcoins room to shine. If history repeats, this could be the beginning of another exciting chapter for altcoin investors.
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