you answered your own question in the title. if it is "pumping" that means it is not possible to predict how much or how long it is going to "pump" because by nature it is a fake rise that only depends on luck and how much money the pumpers behind it have in their pockets and are willing to waste on the shitcoin.

generally the safest thing to do is to jump off the pumping train as soon as it starts slowing down.