Op is no need to know the percentage of each person portfolios but you can also the diversification of the person's investment. You don't have to know because that is a private affair. And as for me I am only invest in Bitcoin and Eloncoin altcoin. And the two are doing great. Though Eloncoin is just a new project that hit the market recently and it is doing well. Diversification of investment is good and it is also dangerous because altcoins are not reliable. They can disappoint someone at anytime.
Every person has their own take when it comes to investments. As long as you know what you are holding,
and what risks you are taking, it is your own prerogative where to put your hard-earned money.
Diversification is always advisable. It doesn't mean you can only hold crypto, you can also include tangible
assets such as gold jewelry, real-estate, precious metals among others.