The lead-lag relationship between Bitcoin and Altcoins is primarily driven by greed and FOMO. As capital moves away from altcoins, it presents a buying opportunity for well-informed traders to own altcoins while prices are still relatively low.
And as the pendulum continues to swing under the propeller of greed in favour of a particular market mover like BTC, disparity begins to set in on the metrics on various altcoins performances in varied degrees.