[nosuchthing]

The original studies suggests early mining rewards were distributed mostly to a small group of users. It also shows attempts by large stakeholders to hide their large holdings by distributing funds across several wallet accounts.

If someone were to have monitored IP addresses in the swarm it may be possible to correlate attempts from single users hiding their funds across many wallets. Simply looking at the blockchain balances of single addresses will not necessarily indicate a single person controlling many addresses.