The wallet.dat file is the fundamental database for the Bitcoin Core wallet software. It functions as a digital vault, storing the keys necessary to access and spend your Bitcoin. What is Inside a wallet.dat ?

Keep your backups in safe locations, ideally encrypted and in multiple physical locations.

Back then, Bitcoin was a hobby for cryptographers and nerds. Elias had mined a few hundred coins on a whim, back when a laptop could actually solve blocks. He remembered the thrill of the first "reward" hitting his digital ledger, but life had moved on. He finished his degree, got a job in insurance, and forgot the password to his digital vault. Now, with the price of a single coin hovering near an all-time high, that forgotten file was worth more than his house, his car, and his retirement fund combined.