Patch Notes and "Hype" Buffs
Every time Grinding Gear Games releases patch notes for PoE 2, the community dissects every change. Sometimes, buffs that appear minor on paper get blown out of proportion. For example:

A skill gets a 10% base damage increase.

A cooldown is shortened slightly.

A minor node in the skill tree adds a conditional bonus.

These changes can ignite community hype, leading to Path of exile currency sudden price shifts in relevant items. This is particularly common during the pre-league period, when players theorycraft and plan their league starters based on assumptions, not real testing.

If you’re quick to react (or better yet, predict these moments), you can buy up related items before they spike and sell them for POE currency for sale significant profits.