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.
You have added ADA mate because this is also one of the most promising coin soon , but indeed Polygon , Binance coin and Solana is in good position now, have been seeing many people trying to push those coin , but the most promising of all is BNB because aside from being supported by Big exchange? also this is one of the cheapest transacting coin nowadays.
But we have a Altcoin Bullrun last year so basically Altcoin season follows.