Personal recommendation for an interesting #34C3 talk today: @cbeams will introduce you to the decentralized exchange platform Bisq. 6pm on the Chaos West stage in the assembly hall: https://events.ccc.de/congress/2017/wiki/index.php/Session:Bisq_-_A_decentralized_bitcoin_exchange#_79539fb9443520a8d18bbbd61ae8a830