Everyone is expecting that the price will increase, but will people buy BTC at those high prices? or will people rather make use of the cheaper altcoins that are not subject to another halving or another difficulty increase etc.
if they see the price jumping they will buy when the train is started, yes, it was the same thing with the last pump i think, because when a pump start at least a double of the value is achieved i think, so you can be certain that it will not stop at 10% of the value that was pumped for example
you shouldnt underestimate the power of a buying frenzie. even when i know fine that some coin is being pumped i cant help but feel the need to buy some at some point so as not to miss out on the money that can be made riding the wave.