That is something I am thinking as well, even though the statistics were right of the number of wallets that own 1 Bitcoin and more, there is a sure thing that 1 person owned multiple Bitcoin addresses from it, this is for security and personal reasons as well so we can not dig up why they had such enormous number of Bitcoin I also had other 2 Bitcoin Adress but I am currently sticking to one because I don't really have the number of Bitcoin to circulate it in multiple addresses,
Furthermore, this kind of thing is pretty normal back in the days when people are just mining and earning with faucets, and a lot of people that keep forgetting their wallet passphrase or password, but I don't know if multiplying your Bitcoin to a number of wallets can make an impact with its price.
I got my first mBTC sometime in 2012, and ever since that date I have created dozens of Bitcoin wallets. I have/had accounts with dozens of cryptocurrency wallets and they alone should number ~20-25. On top of that, I had created a dozen or so wallets in Blockchain.info, before moving my coins elsewhere. It is hard to calculate, but my guess is that I may have created close to 100 Bitcoin wallets. As of now, I am storing my BTC in around a dozen different wallets (including exchange wallets, online wallets, hardware wallets and paper wallets).