Before you can trade cryptocurrencies via the Cryptocurrency Service Provider's web app, you need to enable Crypto Plus trading permissions in the IBKR Client Portal.
Once you have enabled Crypto Plus, all buy orders must be pre-funded by transferring funds from your IBKR account into your IBKR-linked Cryptocurrency Service Provider account held at Paxos Trust Company or Zero Hash.
All exchange and custody services in connection with trading and holding cryptocurrency tokens and other digital asset tokens through IBKR trading platforms are provided by Cryptocurrency Service Providers. Learn more.