Just like what you said, just choose the best altcoins and have the product. I believe that you will always be safe in this market, never believe in new projects because they need time to develop. And they can die at any time
Obviously, and also many people have regretted when they prefer a new project to the best Altcoin that already has a product, so this can be a very valuable lesson for everyone in choosing Altcoin.
Even if new projects are available, I believe they will still fall apart in the first phase. That is the general situation of altcoins at the moment, and if someone invested in them, they will surely regret it as you say.