Next frontiers: Lifi, optic fiber, Steganography, nuerolink, infared, 3DS Street pass, ocean ripples, specialized rings, or gems.

Who knows, promising innovations with the stuff mentioned in the original post.

Bitcoin will become more, and more transmissible, and therfore more, and more uncensorable.

We're getting to the point they would have to drag humanity to pre-internet, and electricity times to stop bitcoin but even then technically Bitcoin could still exist on paper, and metal 💀.