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. The FED is expected to begin aggressively raising rates and doing 50bps rises. 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.