[2021]: Bitcoin Core Wallet.dat

However, the developers are modernizing:

Bitcoin Core has transitioned through different database backends to improve reliability and portability. Data Directory Structure - Bitcoin Core - Mintlify Bitcoin Core Wallet.dat

By default, the wallet.dat file is , meaning anyone with access to the file can potentially steal your funds. However, the developers are modernizing: Bitcoin Core has

Bitcoin Core must rescan the blockchain to find all transactions belonging to your restored keys. This can take hours. You will see a progress bar reading "Rescanning..." at the bottom of the window. This can take hours

For the prudent user, managing wallet.dat revolves around three pillars: backup, encryption, and physical security.

To understand wallet.dat , you must first understand the difference between a "wallet" and a "wallet file."

Do not confuse wallet.dat with the blockchain data. Backing up the blockchain is useless for restoring your funds. You only need the wallet.dat file or its seed phrase.