However, thou Bitcoin transaction is transparent and can be seen by anyone on its blockchain, I doubt if it is possible to see a hierarchy of users with the highest amount of Bitcoin, as a criterion for you to have come up with this statement of yours.
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by bitinfocharts
Exchange portfolios are included in this chart. So it doesn't take much to say what's in the title. But even so, I believe this ratio is still better than that of many fiat currencies.