BTC dominance moved below 64.4 percent after holding an upward trend for over seven months straight.
Traders are now expecting many altcoins to rise fast as Bitcoin gives up market strength this week.
The price chart now shows that altcoin volume could increase while Bitcoin dominance continues to fall.
Bitcoin's market dominance has dropped below a rising trendline for the first time in over 7 months, triggering speculation of a major altcoin rally. The 64.39% level was breached on July 11, 2025, marking a technical breakdown that analysts believe could lead to increased volatility across crypto markets.
Source: X Breakdown Below 64.40% Signals Shift in Market Structure
On the daily BTC Dominance (BTC.D) chart shared by CryptoBoss (@CryptoBoss1984), a clean breakdown below the ascending support line is clearly visible. This trendline had been respected since early January 2025, forming a reliable structure that guided Bitcoin’s growing market share over altcoins for most of the year.
The breakdown occurred just after BTC.D failed to reach the overhead horizontal resistance near 66.60%. This level had capped multiple rallies in recent months and acted as a reversal point yet again. With the loss of the 64.40% support, the trendline now becomes resistance, and traders anticipate continued downside if Bitcoin fails to recover this level quickly.
CryptoBoss wrote on Twitter, "$BTC.D Update: it's happening, dump it," highlighting the shift in trader sentiment. The phrase was accompanied by a chart showing a red arrow projecting further downward movement. The tweet garnered over 47.8K views within hours, with many replies signaling bullish expectations for altcoins.
Traders React as BTC Dominance Break Spurs Altcoin Optimism
The drop below trend support has sparked immediate reactions among traders. Many users in the replies described the move as a bullish development for alternative cryptocurrencies. One user posted “$VOO to $2 ” while another simply responded “BULLISH.”
The reasoning behind this response lies in how Bitcoin dominance affects market dynamics. When BTC.D rises, Bitcoin tends to outperform altcoins. But when BTC.D falls, capital often rotates into altcoins, increasing their performance and market share.
This sentiment shift is aligned with the chart setup, which now indicates a possible trend reversal in dominance. If BTC.D continues to decline toward lower support zones, such as the 62.00% or 60.50% levels, altcoins could experience sharp upward momentum. Historically, these levels have led to powerful sector-wide rotations, particularly during bullish macro cycles.
Market watchers are now monitoring whether BTC.D will confirm this breakdown with follow-through candles or if the dip will be short-lived. As of now, the immediate bias has tilted in favor of altcoin market strength.
Could a BTC Dominance Drop Trigger an Altcoin Supercycle?
The central question now emerges: could this BTC.D breakdown be the first step in a larger altcoin supercycle?
The drop has interrupted an eight-month uptrend that favored Bitcoin, creating conditions for a new alt-driven narrative. If dominance continues to decline, sectors such as DeFi, gaming, and layer-1s could see inflows.
Traders are already pricing in altcoin moves, with calls for rapid gains if BTC.D extends its breakdown. Historical trends support this theory, as multi-week drops in BTC dominance have often led to broad altcoin rallies, with some tokens gaining over 100% during similar past periods. All eyes are now fixed on upcoming sessions to see if the 64.00% level converts into resistance and confirms a structural shift in crypto capital flows.
