I have a wallet.dat which I registered in 2011-2012 where I have 150 BTC 1 and now I'm trying to sing in there with bitcoin-core/electrum but it doesn't work (bitcoin core 0.17.1 says "wallet.dat corrupt. Salvage failed" and electrum says "utf8 codec can't decode byte 0xf5 in position 60; invalid start byte")

I tried pywallet but it returned an error "Couldn't open wallet.dat/main. Try quitting Bitcoin..."

It's not password encrypted.

What should I do? Are there any chances to return my money?