Do not be of the opinion that a coin has already increase in price therefore it can not increase further when they are quality projects, such mindset should not make you go searching for new gem and end up buying into Scam coins instead explore more possibilities in those well known project. Project like Solana, DOT, BNB, BTC, ETH can still give you good profit and you investing now does not mean you would be profiting less.
You see that's the kind of opinion that makes people loose opportunities. The opinion that, a thing has gone too high or not just low enough to either buy or sell depending on the thrilling circumstances. It's another way of welcoming or giving yourself up to procrastination you know, the next thing you know is waiting and waiting for now definite time and thing.
Well, its always safe to invest in the listed coins especially, BTC, ETH, BNB, XRP but then, there is also an opportunity in altcoins, you've just got to ensure what your investing in isn't a shitcoin but how could you tell!