What Is the Minimum Number of Confirmations Generally Considered Safe to Mitigate a Double-Spend Risk?

The minimum safe number of confirmations is subjective and depends heavily on the coin's hashrate, the transaction value, and the receiver's risk tolerance. For high-value transactions on a coin like Bitcoin, six confirmations (approximately one hour) is the widely accepted standard.

For smaller altcoins, a much higher number may be required due to lower hashrate and greater vulnerability. Exchanges often require many more confirmations to ensure finality before crediting a user's account.