In reality, I feel like the new/old distinction isn't too much of an issue because we often get FOMO during price increase cycles regardless of the product's age. And as long as bullish sentiment is enough to make us act, either way, there are opportunities/risks.
Like recently I was considering choosing between TONCOIN and SOL, but looking back, both have had strong performance with quite impressive price increases. So no matter from any angle, the investment plan should be clear from the start and accept everything that will happen even if it is a bad situation.
But, there is still a difference. When you FOMO into an old cryptocurrency that has been around for quite some time and has been doing very well, even if it drops in price after you purchase it, you will rest assured that it will at least go up again since it has a good track record. However, if you FOMO into a new cryptocurrency that doesn't even have a track record and there is no historical charts or patterns available for you to evaluate, if it drops in value after you purchase, you don't know whether it will regain value or not.
So technically, it is safer to invest in cryptocurrencies that are old even if you FOMO and buy at the wrong time, you will at least have some peace of mind knowing they won't go down and stay there forever but that happens with new cryptocurrencies and we can see thousands of such cryptocurrencies in exchanges that are down and don't go up at all.