Solana for me. There is a massive growth in the number of projects this year under its chain which I believe pushed its market value upwards. Others are SUI, ETH, and although it is not an altcoin, I'd still count Bitcoin. These are the coins where I am gaining at this point, but I also have a few holdings with other alts such as with some meme coins just to not let the hype pass. We know how many altcoins are there as options to choose from but I always tend to select a few from the pool given how unpredictable their market prices are. On the same extent I am able to track their charts and price behavior all the time. For now I'd be sticking to these coins and wait for further market confirmation but I am keeping my eye on some new projects for their presale. Diversification is always noted but never make it too scattered that you won't be on watch on each of those coins.
Major coins are indeed the best option if you're into long term investment. ETH for sure would be on everyone's list but I doubt with BNB since there are rumored restriction with Binance, on some countries which could create an FUD. Being updated to these news are important because demand on a certain coin or in this industry in general could be easily affected by the slightest and smallest misinformation, so better be careful to dive on those which are currently having issues.