Altcoins can fluctuate extensively during bull markets. Altcoins tend to see fast price increases in short periods of time. This is referred to as a moonshot. Also, a lot depends on the interest of the investor. Investors also invest heavily when a bull market begins, and it's not uncommon for Bitcoin to skyrocket in value when a bull market begins. But investors should check the market by doing thorough research and take a look at the situation before diving into altcoins.