Three questions about alt season

I have seen many different arguments, both for and against, regarding these points.
Can someone help clarify these three questions?

• Should we expect almost all coins to pump like 2021, or will it be limited to only a subset of them? If the later is true, what makes those selected ones pumped - tech / community / luck?
• Should we anticipate returns similar to those in 2021, where many coins achieved x10 or x20 gains, or should we be satisfied with more modest gains like x2 or x3?
• Are we already in an alt season already without knowing so?