Tap a bankcard? You can even tape it to the back of your phone

Just use your credit card

If you have a lot of resources to protect against or known risk, you segment.

For example, do most daily transactions at one bank, and keep the rest at another.

This happens a lot in companies and government - you outsource payable operations to different division of government or a contractor. Hire one to do custody of money, another to process disbursements.

Smartwatches are great for this.

I wonder if this makes room in the market for some simpler device for payments. Something like a wearable that you can tap-to-pay and has the signed software attenuation but nothing else so you can't be tracked using GPS.