What is Token Unlock?
It means there is a large amount of currency that was 'locked' (not tradable), and it will suddenly be unlocked, allowing its holders to sell it.
The result?
A large selling pressure that could cause a drop in price even if the project is excellent!
Example:
A currency has 10 million tokens locked, and it will be unlocked next week.
Early investors might sell a large part immediately = sharp price drop.