Have you ever looked for mined but unmoved Bitcoin? Would be interesting to know how many there are.
https://blockchair.com/bitcoin/outputs?s=time(desc)&q=is_from_coinbase(true),is_spendable(true)#f=is_from_coinbase,time,is_spendable
According to blockchair.com, there are 196,479 outputs of coinbase transactions which are spendable. I.e, they are unmoved.
We have block 0 in that list But block 0 output is unspendable.
These are the number of outputs but not how many Bitcoin. It should be > 1 million Bitcoin (at least)