According to @rektcapital, when Bitcoin (BTC) breaks its all-time highs (ATHs), altcoin holders often experience underperformance as capital tends to concentrate in BTC during such breakout rallies. Historically, altcoins lag behind BTC's initial surge, potentially leading to short-term losses or missed gains for traders focused on altcoins instead of Bitcoin. This pattern indicates that traders should closely monitor Bitcoin's price action and consider reallocating portfolios during BTC ATH events to capitalize on the leading crypto's dominance, as cited by @rektcapital on Twitter.