According to Crypto Rover, the Bitcoin dominance index must reverse at current levels, signaling a pivotal moment for altcoin performance (source: @rovercrc, Twitter, May 21, 2025). A reversal here could indicate an upcoming shift in capital flow from Bitcoin to altcoins, which typically triggers increased volatility and potential trading opportunities in major altcoin pairs. Traders are closely monitoring the BTC.D chart for confirmation of trend reversal, as sustained dominance could suppress altcoin rallies. Monitoring Bitcoin dominance is essential for optimizing portfolio allocation and timing entry points in the crypto market.