Use tools like Have I Been Pwned to see if your email has already appeared in a known combolist. Combolists and ULP Files on the Dark Web - Group-IB
For the criminals who download it, the list is a key to "credential stuffing." They use automated bots to hammer the login pages of major exchanges like Binance or Coinbase, hoping that users reused these same passwords across multiple accounts. The Human Cost 2M COMBOLIST CRYPTO.txt
Use a password manager to generate unique credentials for every single service. Use tools like Have I Been Pwned to
Behind the lines of text in 2M COMBOLIST CRYPTO.txt are real victims. Behind the lines of text in 2M COMBOLIST CRYPTO
Even if a user changed their password on one site, "old passwords" found in these combolists often remain dangerous if variants of them are still used elsewhere. Protecting Your Digital Fortune
Use physical security keys (like YubiKeys) for crypto accounts to prevent unauthorized access even if your password is stolen.