Crypto-currency exchanges haulted registration of users

A number of large crypto-currency exchanges haulted registration due to new market entrats inflow. 

The platforms were under pressure of orders on crypto-currencies and decided to stop accepting new clients for a while, according to Business Insider.

At least three cryptocurrency exchanges — Bittrex, Bitfinex, and CEX.io — became known to stop onboarding new users altogether. All the exchanges have similar problems as primarily their capacities didn't account for overwhelming number of people and extraordinary pressure, Hightech says.

At the moments of bitcoin booming they have to stop activities at all. Three exchanges issued similar statements that they had to stop the registration of new users. 

"We have received an enormous number of new account registrations over the past few weeks. Unfortunately, we have to make a few upgrades to our support and backend systems to handle the increased traffic and load," Bittrex's alert says. 

Bitfinex announced to return to registration on January 15. CEX.io said that "extraordinary number of new users, who opens accounts on the exchange, don't allow the company to ensure ordinary business processes and handle orders of existing clents". 

American Kraken exhange is still open but new users can't pass accounts verification because the registration. They are prohibited to purchase and sale crypto-currency without verification.