The reason for the high of Bitcoin is the chinese Yuan or Renminbi. Since China is the biggest Bitcoin market and the Yuan had a low during the past few months many chinese citizens invested their money in Bitcoin. This led the Bitcoin raise up to 1000$ per Bitcoin. Since the chinese government annoucned that it will regulate the virtual currency, for sure many people sold their Bitcoin again. However, other experts expect a Bitcoin price of about 3000$ to 7000$ per Bitcoin.