In my opinion, each coin has an 'active' period that has been calculated like a cycle with a market share that does not increase all the time. Maybe because of uncertain market needs, coin prices are unstable.
I think it's normal, but if I'm not mistaken BUSD is also managed by a consortium which includes well-known financial companies too, but if Binance is already going there, this also has to be taken into account because if there is talk of being removed from the exchange it will be at risk in the future and this is why USDT dominant for everyone because it is the most traded cryptocurrency in the world and if the OP says that BUSD is less of a priority it is very reasonable.