Why do altcoins need to pump?

[Nikitosnik99]

I see a lot of people mentioning that in 2025 altcoins will pump. I am new to crypto and don't really understand why they "need" to pump this cycle. I understand that it has happened in the past four cycles, but I don't see the reasoning why it would need to happen again or why it happened in the past. This is not me trying to spread negativity I just genuinely don't understand why altcoins pump a year after Bitcoins halving. Is it just because it's a follow the leader sort of thing and Bitcoin tends to pump a year after halving? If so, why does Bitcoin tend to pump a year after halving?