This is very doubtful. I've been with SquareSpace for almost 10 years, and they are always last to the party when it comes to ecommerce. I remember when they didn't have PayPal integration and they were forced to.
Crypto is like PayPal, except adoption pressure for them to integrate will be 10-20x more intense in the next year or two.
No crypto payments in the very near future is a deal breaker. Shopify and WooCommerce already have it integrated. SquareSpace design/aesthetic advantage is no longer noticeable. Right now for me, it's a convivence issue to stay with SqaureSpace, as soon it becomes a business issue I will gladly switch if they don't have modern ecommerce tools.