The truth is that, during bull season, it's not every altcoin that is going to pump and while Bitcoin price was surging high even before the halving month around last year, some altcoins was also pumping in respect to Bitcoin's price surge.
With regards to price history, this year is supposed to be when Bitcoin will reach the highest price peak before bear market will kick in and since we are not yet in the bear season, there's a possibility that many altcoins will still pump before bear season start.