I’d ask what atomic swaps are but it’s Sunday and Sundays are for pondering the universe. 
Discussion
Beautiful!
https://boltz.exchange/ is one example of atomic swaps on bitcoin
is there really a question mark in the middle of the picture?
Atomic swaps are the universe.
This is a picture of several galaxies. If our Milky Way galaxy was the width of the USA then our solar system would fit on the end if your finger.
Probably like a DEX for stars