Infact, let me revise the question. Has there ever been a season called altcoins season, where bitcoin will not rise and only altcoins will be rising?
Of course, not. Everything in this space has its fulcrum on Bitcoin. What we regard as alts season is an aftereffect of the bull rally from Bitcoin. Once Bitcoin momentum begins to die off, most investors take out their profit in Bitcoin and plunge a part of it into altcoin purchases. That's the pattern we often see. Though I've to admit that I didn't see much of that rush in 2021 after Bitcoin achieved its ATH. Bitcoin is the game in this industry and all eyes are on it.