If you like BNB Coin as a pledge currency, then keep Bitcoin on your chest. Because Bitcoin exists today, other Altcoins survive in the market. As you continue to see bitcoin price drop it recovers straight away, the last dumping in the bitcoin market was the $70k to $49k touch. But that Bitcoin touched again up to 62K then you notice that Bitcoin is definitely preferred as the best coin. And other altcoins are in their rightful place, the general improvement has been slow, Bitcoin is the best.
I agree. It's just safer in the long run, even with the possibilities in alts, if a person has the funds to spare, it would be wise to use them for BTC accumulation (using DCA, preferably). No storm would break the trust in it.
If you want to do DCA in Bitcoin then you can definitely take help from this topic. Because all kinds of discussions on how to do DCA in Bitcoin are done in this topic, you will definitely get the right advice from here.