Altcoin season, to put it simply, means that Bitcoin has risen to a certain point and is starting to rest. The hot money in the market has nowhere to go, so it flows into altcoins.

Strong altcoins can double or even multiply; weak ones may also see gains that match Bitcoin. Altcoins are speculative tools, and their purpose has never been to hold them long-term, but rather to exchange volatility for more Bitcoin. Keep your focus on this goal.