The rise of Bitcoin (BTC) often serves as a signal for the launch of altcoin rallies. When BTC performs strongly, market sentiment generally shifts to positive, leading to more funds flowing into the crypto market, which drives altcoins to catch up. At the same time, some investors may seek higher return opportunities after Bitcoin's rise, diverting funds to potential altcoins. However, it is important to note that altcoins are more volatile and carry higher risks than Bitcoin. Investors should combine market trends with the fundamentals of individual coins to manage risks effectively and seize opportunities in altcoins driven by the Bitcoin market.