interesting that this comment has been voted up :) - you are not the target market - if you can spend the cryto you HODLing on Monzo as easily then your comment is valid.
Barclays is one of the only banks slowly accepting Crypto related transactions.
Most people I know dealing with Crypto are using Revolut as they are not a proper bank. However, they recently blocked transactions to Coinbase's account (this is most likely because they are applying for a UK banking license).