Pump and dump is part of crypto trading, every coins including bitcoin pump and dump. To avoid this, buy when it is low and sell when high. Flow with the tide.
It is not possible to avoid these pumps and dumps, they are inevitable parts of digital world especially crypto market. there is no need to waste your energy by going in stress through dumps of your coin rather stay positive especially if the coin is bitcoin because bitcoin increase in value highly after every dump. Just try to buy coin when it is going through dump and sell it off when there is increase in values.