Drop in the price of bitcoin also affected the altcoin prices negatively that is why you see the downtrend, probably we can expect a real surge in bitcoin's price post halving when the altcoin market will also influenced and take hits.
As of now Memecoins especially on Solana is being the choice for short term profits so you can try if you wanted to make money now or just buy the established coins for long term.
This is true that if bitcoin goes down then every other coin also goes down because bitcoin effects the price of each coin so it is necessary to be noted that if bitcoin halving take place then not only bitcoin will pump but every altcoin will also surges.
We have to not only buy bitcoin but think about investment in certain potential altcoins so you can take huge profit during current Bull season and also during coming halving as we have to take benefit from the specific events like halving.