Asking for advice about my portfolio

Hello guys, I started investing in crypto about 2.5 yrs ago. BTC was around 25k, SOL was around 25e, so prices were pretty low as I started buying. I did DCA, putting every month xxx Euros in my account and splitting those into few altcoins… December 2024, my portfolio hit all time high; I had almost doubled my portfolio (had twice much money than I have put in)… One year later, december 2025 I am already down, almost 30% from all the money I invested in my portfolio. I only hold altcoins, those being: SOL, LINK, TAO, TRAC, PENDLE, AVAX and SUI. My question now is-what to do? I am really torn between two facts-first being that everyone is saying BTC is going down (correction); I always tought that my altcoins correlate to BTC, meaning if he goes down my coins will as well. On the other hand I know that for altcoins to explode, BTC dominance needs to be lowered; so if I am reading it right, it means that dominance is gonna go lower and altcoins will explode, or they wont? I know it is unpredictable but still would like to hear your opinions.

PS While holding these coins I did sell them into USDC when I tought they were too high, but as soon as price dropped I rebought them (in lower position)-but still my portfolio is red now with 0 usdc, only those 7 altcoins left. Thanks for all advices