Do you agree with this assessment from the article or do you have more credible and accurate information?
This proves that if used correctly, Bitcoin still is pretty much anonymous (OK, pseudo-anonymous).
Clearly some may track down some of the funds to certain persons, but clearly that's far from accurate and clearly they will not tell us all their findings and traceable links for that.
I guess that nobody can tell you 100% if those numbers or the top "owners" are correctly pinpointed.
Who can tell that, CZ, for example, didn't make it yet to top 10?
Is that even accessible?
Bitcoin is vast and so are the holders, so it will be practically impossible knowing the highest holder of btc
No, such info is not 100% certain, there are speculations and suppositions.
If somebody has 1000 smaller wallets (well, not that small, actually), it may be much richer than we think and may stay nicely away of such lists.