These are all great tips but in the end a well disguised scam will get through all of these checks. Always good to look deeper into some of these that you pointed out it can at least detect the lazier scams. I'm more worried about the long game scams that are disguised as good functioning projects. Those types usually bail with tons of money vs the lazy ones that don't even pass the initial sniff test.
Yes you're right altcoins needs a very deep research of the market and trends. It's more suitable to invest after some of the time has passed because then you get some information and graphs to get an eye on the ups and downs of the project
moreover you will get to know how the team of the project is performing and how much they are serious about their project because the use case of the project in future is very for its growth no project can survive without having some meaningful and technical aspects.