The US Federal Reserve is having a monetary policy meeting. Being the largest economy in the world, these meetings are keenly watched and have far reaching consequences. A useful tool to watch is the CME FedWatch Tool, which shows what the market is predicting the rates will adjust to: https://www.cmegroup.com/trading/interest-rates/countdown-to-fomc.html
For more information on how central bank monetary meetings effect Crypto, click here.