Imagine to yourself how many wallet with astronomic sums of bitcoin people lost or lost because they didnt give a fuck when bitcoin was tiny.
and those wallets..will never get acceesable
I don't need to imagine i can check that on blockchain since all transactions are registered in public since start of bitcoin.
You need only to check addressed which coins don't move since around half of 2010 for example.
It seems to me that those who lost Bitcoin in those years tried or even could have returned access to their wallet. Because to restore access to today is not a big deal because all the data are assigned to a real person, so I do not think this is a problem. But to trace all operational data on financial operations. And this is certainly possible.