Bitcoin Core developer Luke Dashjr has raised concerns about the finality of Bitcoin transactions, stating that the widely accepted six-block confirmation rule no longer applies. According to him, it now takes more than a week for transactions to finalize, raising questions about Bitcoin's censorship resistance. Dashjr believes that due to the increasing centralization of Bitcoin mining pools, the traditional standard no longer applies. He explained that he tried to update the six-block confirmation target in Bitcoin Core's alternative, Bitcoin Knots. However, his calculations show that due to Antpool's significant share of the network's hash rate, it now takes more than 800 blocks to achieve 95% security - equivalent to about 5.5 days.