I will invest on any of these coins instead of new projects, they have failed me too many times and I don't want to keep doing that, time to move on to old and top altcoins, they are dependable than new coins that only aim on cashing out
Investing in top coins doesnt mean of sure money. Its just that compared to new coins, well established coins are less risky and you have a high chance to profit if you follow the right strategy and mindet of an investor.
What important is you know how to do a research before investing because even old coins has risk.
Yes, you are right with that. If the newbie doesn't know the simple rule in trading, which is buy low, sell high - he will still lose his money if he will not play his cards right. But investing in top altcoins is a better start to understand how crypto trading works. If he understands those coins, he can slowly proceed to other alts, but should be one at a time. Because it would be overwhelming if you follow a lot of alts being a beginner in crypto.