I have never met someone or thought about the Cash App stacking to a BitKey before! I love this idea, I could totally see this being implemented into my Bitcoin setup. I honestly love the idea of having to sell every time you want to buy something with the card. ColdCard is just the cherry on top, excellent choice my friend! It truly encourages you to save your Bitcoin. Kudos to you.

I will say, the more you go out to your local stores and talk about Bitcoin (within reason and while being respectful) the more it matures and thus increasing the accepting problem. It starts with us.

Lastly, regarding your main lightning setup... This has to be so great for you, I like how you use combos between Cash App and the BitKey hardware wallet and Alby Hub and the Go app. You're using those products and services how they were probably meant to be used.