imo, altcoin is a very interesting way to make profit, but you have to analyze and research carefully to make an investment. If not, you just throw your money thru the window. /insert stonks meme/
Totally agree

do you have any specific standard that when the project meets that standard, you know they are trust worthy?
Mine is a little bit unclear

i search for the information about the project, read their white paper. Based on how much the information "make sense" to me. I will make decision.
Mate, we just keep saying all we have to say and many off people advising this research are not also following that rule because it is really difficult to spot a bad project even with research, there is no extra method that they use other than what you are using, and none of them can tell me that before they invest in any project that they go as high as going to see the location or the abode of the project team directly for them to see their face and hold them when they scam.
Every research is still base on their whitepaper which would not completely tell us about the team, we just still have to research and then use of gut instinct to follow the one we research on. So just do the little you can do and just make sure that any project you want to invest in only takes the money you can easily let go.