usually, the explanation on the whitepaper is usually too long-winded so spend our time. to make efficient the time normally I just read a glance by taking the core of the project. usually I also just read the important info I am looking for and the advantages of the project.
You don't need to read the whole whitepaper.
As an investor, what you must look for is:
-Technology
-Uses
-Token policy
-ICO period
-ICO terms
-Roadmap
Can't imagined why others will just invest their money just because of hype and when ICO ends, lots of questions will be asked by them and all answers can be found on whitepaper.
That's the important information and project detail if you're an investor.
For me, I haven't invested yet but I really do have my favorite altcoins when I do invest in the future and Yes, those you mentioned above are some of the many project information that' s needs to be considered because we really don't waste our time and our money on investing into scam ICOs.
I do not prefer white papers but instead I will bump into their Telegram Channel group and check whether they have many active members otherwise, I'll better drink a cup of coffee and rest.