Hi there,
1. I believe you’re inquiring about bitcoin, is that right? Our current best option for supporting Bitcoin is via our paid Mollie gateway. See here:
https://givewp.com/addons/mollie-payment-gateway/
There is a third-party Give addon here on wp.org that also supports Bitcoin, but we did not develop that.
2. Generally, every form needs an amount to be submitted, so we highly recommend having a minimum donation amount of at least $10 in the amount field. If your form supports a “Custom Amount” then you can use javascript to auto-focus the cursor in the amount field, which effectively clears the amount out. We have a snippet for that here: https://github.com/impress-org/give-snippet-library/blob/master/form-customizations/auto-focuse-on-amount.php
If you need guidance implementing custom PHP functions on your website, we have this guide here: https://givewp.com/documentation/resources/adding-custom-functions-to-your-wordpress-website/
Thanks!
