i wonder what makes you trust a new altcoin? what you're looking for in their company page etc...?
I do not always believe in new altcoins, it is very necessary for me to review the altcoin project in detail. Some of the things I reviewed were, Whitepaper, Roadmap, Coin Uses, Project Benefits, Management team and advisors, as well as the community formed by the project.
If all these aspects are pretty good, then I will believe but not completely, I will look back on the project trip until it ends.