1 BTC = 4391.4475 USD (average from all sources)
1 BTC = 4483.99 USD (source: https://coinbase.com)
1 BTC = 4397.0 USD (source: https://www.bitstamp.net)
1 BTC = 4404.8 USD (source: https://kraken.com)
1 BTC = 4280.0 USD (source: https://poloniex.com)