There's no legit reason that can be base on your statement for altcoin boom cause crypto market is still same, ups and downs is normal phenomena here. Altcoin boom only possible if bitcoin bull run occurred cause altcoin will follow bitcoin line. But if ang bull trap occurred, then after hitting on that resistance, altcoin will fall again. thats unpredictable. But no doubt altcoins like bnb, sol, matic is going to boom this year.
altcoin movement still dominated and influenced by bitcoin price unfortunately so its hard for shitcoin to growth in this condition. while bitcoin dominance drop we will see altcoin price could move decouple with bitcoin , at this moment some altcoin still show its strenght againts bitcoin such as KNC , GMT.