1 BTC = 8594.2775 USD (average from all sources)
1 BTC = 8582.95 USD (source: https://www.bitstamp.net)
1 BTC = 8583.4 USD (source: https://poloniex.com)
1 BTC = 8696.26 USD (source: https://coinbase.com)
1 BTC = 8514.5 USD (source: https://kraken.com)