There is a comfort that comes with Bitcoin investment, it's better you continue to do DCA on Bitcoin than waste your resources and trying to do DCA on altcoins that may never recover. Even ethereum that uses to be the head of altcoins has a terrible run this bull run and not good for any portfolio.
Yes, that's right, it means this, Bitcon=in is the most potential and most trusted top coin. Crypto is Bitcoin, the main one. That means, for DCA, Bitcoin is still the main goal and it will continue to be worth it forever.
However, if you really want to increase accumulation with DCA in certain altcoins, please do so, but make sure it is a potential altcoin, so that later there will be no regrets.