It is common for altcoins to experience a correlation with Bitcoin's price movements, especially during periods of significant price volatility like halving events. While the post-halving period may lead to a decrease in momentum for Bitcoin and altcoins, it doesn't necessarily indicate the end of their rallies.

There are various factors that can influence the rally of altcoins, including market sentiment, technological developments, and overall market conditions. It's important to do thorough research and analysis of individual altcoins, considering their fundamentals and market trends, before making any trading decisions.