On one hand I agree that it would be better if it was more portable, on the other I think it's probably better if people don't walk around with their life savings in their pocket. For that reason portability definitely wasn't one of the priorities for the first version, we think the device as it is now is already useful for the vast majority of users.

That said, we will definitely improve at least the durability, maybe also change the shape/size in the next version (a few years down the line, we just have a bunch of ideas now but we are focused on shipping V1 first).