You don't "carry" crypto currency though, you hold the private key to an address. I don't see how they could determine some random binary blob on your laptop/flash drive/etc. is in fact a private key that is responsible for a number of coins. What if I used an Electrum wallet and just kept the master seed saved, then it's just a string of random words. I could just as easily memorize that or physically write it down somewhere instead.

I think that's why they have a part about determining if technology can be invented to detect this. And a lot of these laws seem to have a point of making easy things illegal, so they have more ways to go after you if they need to.