Currently, due to high demand in the cryptocurrency ecosystem, a lot of major exchanges are offline or are not allowing new users to register: BitTrex, Bitfinex, Binance, Coss and Kraken
1. Bittrex:
Here is the announcement of Bittrex that they have halted new user registration for the time being. The reason is that they have to upgrade their backend.
2. Bitfinex:
Bitfinex also paused new account creation to not undermine the quality of their services.
3. Binance:
Chinese exchanges are also affected. Binance, currently the biggest exchange in China, temporarily disabled new user creation due to a surge in popularity.
4. Coss:
Coss is a rather new exchange. It had scaling problems in the last days and is now undergoing scheduled maintenance:
5. Kraken:
Finally, also the American exchange Kraken is affected, being presently offline for maintenance.
Make sure you have your accounts on the most important platforms when you need them: