Could I request trading exclusively cryptocurrencies under IBUK?

REQUEST TRADING PERMISSIONS

Request cryptocurrency trading permissions within the IBKR Client Portal in the Trading Permissions section. Choose between the Basic and Plus permissions programs…

IBKR does not charge a fee when you request and add trading permissions to your account. The requirement for trading permissions is that you meet the qualifications.

Additional Information…

No, you must open (or have) an IBKR securities brokerage account with trading permissions other than Cryptocurrency first. You then might be eligible to request cryptocurrency trading permissions, at which point a Cryptocurrency Service Provider account will be created for you and linked to your IBKR trading platform's interface. To keep the cryptocurrency trading permissions you must maintain at least half of your account activity in something other than cryptocurrency. …

No, it is not possible to link an existing Cryptocurrency Service Provider account to an IBKR account. If you want a Cryptocurrency Service Provider account linked to your IBKR account then you will need to request cryptocurrency trading permissions in your IBKR securities brokerage account, at which point a new Cryptocurrency Service Provider account will be created for you and linked to your IBKR trading platform's interface…