Are we looking for specific wallets or just wallets in general that have a balance?
Neither, we are expecting that no private keys from a single transaction will ever being found faster then expected by current bruteforce difficulty. That's the best outcome - that everyone fails and Bitcoin is safe.
Is it true that someone found the private key for this wallet?
https://www.blockchain.com/btc/address/1AhTjUMztCihiTyA4K6E3QEpobjWLwKhkRYou may notice that many big wallets are receiving multiple very small deposits from
https://www.blockchain.com/btc/address/1AK4LYE6PYwBmSYHQX3v2UsXXHTvCAsJeK (Bitcoin buy or sell JUBTC.COM)
It seems to be a company which help people retrieve their private keys (they surely try to crack some for themselves

).
I think that if you narrow space search ( for example if you know part of mnemonic words ) , you can retrieve private key from transaction scripts ...
Any thoughts on this?
Does it seem possible?