Yes I checked in the Blockchain and it's empty. I opened the file in the text editor but I did not find anything seed or xprv.
If it's empty, then... it's empty. Again, where did you get this wallet from? Is it really yours? Did you create and deposited/mined these coins or something like this? Not many people supposedly have 33k BTC in a wallet. Actually, according to this[1] site, only 106 addresses have 10k+ BTC (most are inactive).
[1]
https://bitinfocharts.com/top-100-richest-bitcoin-addresses.html