I prefer to buy bitcoin than ethereum in this dip because bitcoin is promising to increase later and bitcoin is the main investment.
If I have many funds available, I will buy both bitcoin and ethereum but if it is not, I will buy bitcoin.
That will depend on how much funds you have to determine which coin you should buy but it is okay if you buy both bitcoin and ethereum even if you have limited funds.
I hope you do not confuse to decide but before you buy bitcoin or ethereum, make sure you analyze both so there will be no regret in the future.
I think most old school investors here prefer to have Bitcoin in their wallet and hold on it as compare to Ethereum. Nothing against Vitalik and his invention, but Bitcoin is the prime mover in crypto no matter what they say.
So for me, I will stay with
BTC, and since we are in a bear market now, it's better to buy and fatten your wallet and do the old but very effecting HODL strategy.