DCAing into BUSD? Does it make sense?

I have been purchasing ~330 USD worth of BUSD on Binance every month for the last 6 months and putting it in Binance Earn for 8% APY.

I've not only been earning a small amount daily from this, but also holding a much more stronger currency than my own (NZD) which has dropped over time, causing my BUSD portfolio to be worth more in NZD (unintentional)

Now I'm wondering, if this an effective method or does it just not really make much sense as the value of the coin does not change?

Would it make more sense to just DCA into Eth

Thanks in advance

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EDIT: Glad to know I'm not completely smooth brained. Thanks for your back up