Peter Todd: “With some miners threatening 51% attacks against Bitcoin, researching a PoW change is a good backup plan.: btcpowupdate.org” Posted on March 20, 2017 by 1 Bitcoins 1 Bitcoins Bitcoin News and Search 1 News - 247 News - 247 Bitcoin - 1 Search Search for: submitted by /u/TomorrowisToday_ [link] [comments] 1 Bitcoins Bitcoin News and Search 1 News - 247 News - 247 Bitcoin - 1 Search Search for: