Almost all Bitcoin exchanges (such as Bittrex and HitBTC, and even including Coinbase) have broken the all-time-high, $6,000 barrier towards the end of this week - followed by the rest of the exchanges, catching up.
Today's highest cap was $6194.88 according to the broadly popular website, Coin Market Cap, which follows its market capital to break through the $100,000,000,000 cap.
(My own content copied from my own blog - www.readcrypto.blogspot.co.uk)