TLDR: To add cryptocurrency as a source, provide the amount contributed, the origin of funds (e.g., salary), and if funds came from outside the UK. After adding, the outstanding balance updates. Evidence like a sale receipt must be uploaded to confirm the cryptocurrency source.
Your cryptocurrency
After selecting to add a source, you will then have the option to select cryptocurrency. When adding cryptocurrency, you'll need to provide the following information:
The amount you are contributing from cryptocurrency
Where the funds came from to buy the cryptocurrency e.g. your salary
If the funds originally used come from outside the UK
Once you have added the source, you'll see the outstanding balance update to reflect this. If you need to change or remove the source, please select 'edit' next to it.
Evidencing your cryptocurrency
If you have added a cryptocurrency as a source, you'll need to provide evidence of this. You'll be given a new task to upload a document confirming this, such as a receipt of the sale.