Lately the predictions have even gone as high as $250k considering that ETF approval may happen as well as the halving. These are valid optimistic projections in my opinion.
Buying at the current price is cheap because non of the expected triggers has happened. Market is simply moving naturally as it should without external factor influencing it.
I dont have projection for the next All time High But I do believe that is way more than previous ATH, So the DCA between 30K-35K is still a good point. Last ETH is around 69K so in the next ATH I think the 70-80K is highly achievable