Where can you register?
You can sign up here: https://bittrex.com/account/register
What can you trade?
How do you store cryptocurrency?
It is best to not store your cryptocurrency on an exchange, as these methods are prone to hacking. In most situations, you don’t control the private keys tied to your account; private keys are used to recover cryptocurrency addresses. If these private keys are mishandled, or compromised in anyway, your cryptocurrency trading account can easily be drained by hackers. For storing cryptocurrency we highly recommend a hardware wallet, desktop wallet, or mobile wallet where you control your private keys. Check out the Wallets section, to pick a cryptocurrency wallet that’s great for you!