Recent drops have been caused by a combination of factors, Noble theorizes, from excitement about low-quality coins, to negative remarks from Elon Musk, to China’s recent crackdown on crypto services. The accumulated response made this sell off “all the more violent,” says Noble.
U.S.-based users could continue to use the service by browsing the site with a VPN. Binance allows its users to sign up for a limited account without KYC — i.e. providing verification documents like a passport copy — which allows trading but limits withdrawals to two Bitcoin per day. That won’t satisfy more professional traders — most of whom you’d imagine would already have an account on Binance by now — but it does leave a loophole for others.

Cryptocurrency is an asset that can be exchange for goods and services, much like normal money.
The SADF test finds the largest ADF statistic from all the windows considered. If this value exceeds a critical value, the null hypothesis can be rejected, and it is deemed the series displays explosive behaviour in at least one of the windows (taken as indication of a bubble occurring).