Some blockchain explorers also have a "Rich List" that will sort the list with the top holding addresses....some will provide stats according to address weights....Look at the stats in the blockchain explorer of the particular currency you're interested in comparing....There can also be several different explorers for the same currency that display alternate information....Just check out the different block explorers....you might be surprised at what you'll find!
https://bitinfocharts.com/top-100-richest-bitcoin-addresses.htmlHere's the link you just talked about. I have seen these rich lists and they're amazing.. These guys are either huge players (billionaire investors) or people who bought BTC under $1 and are now living off it. Top 1 player has a third of a billion.. However, I don't think anybody knows who these guys are. Wondering how they manage their funds..