Cryptocurrency prices fell across the board today, with Bitcoin (BTC) and Ethereum (ETH) taking the biggest hits.

The price of cryptocurrency took a nosedive today, with some coins dropping by more than 10% and Bitcoin falling below $4,000 for the first time since November 2018. There are a number of reasons for this sudden downturn in the crypto market, including Facebook’s ban on cryptocurrency ads, but it’s hard to say which is the main culprit. In fact, many experts have pointed to a number of different factors as being responsible for today’s crash.

Why is Ethereum down?

Ethereum has been one of the hardest hit by today’s crash in cryptocurrency prices. The world’s second largest cryptocurrency has dropped over 15% in value over the last 24 hours and is currently trading at $151. Experts point to an increase in regulation surrounding Ethereum as one of the main reasons for its recent dip in value.

Chairman Jay Clayton, who heads up America’s Securities and Exchange Commission (SEC), recently stated that Ethereum should be regulated as a security rather than a currency because it was not decentralized enough.