Is 3 Confirmations Still Sufficient if F2Pool Can Mine 6 Consecutive BTC Blocks? By Cointelegraph

Concerns regarding the security of Bitcoin were raised on May 18, when the F2Pool mining pool mined six consecutive blocks on the BTC blockchain, specifically blocks numbered 630804 to 630809.

This event prompted discussions about the adequacy of relying on just three confirmations for transactions, particularly since many exchanges and Bitcoin services use this standard before allowing fund withdrawals. Some questioned whether this is still a sufficient level of security in light of F2Pool’s actions.