Imagine the multi-verse like quantum foam. It’s a bubbley-fluctuation of expansion and contraction of each universe. https://m.youtube.com/watch?v=scOCuRuMFy8

As opposed to a bunch of floating bubbles that knock around.

This fluctuation means the energy works out🤷‍♂️

That’s the way I picture it. As above so below.

Edit to add: if you imagine space time at the Planck scale, there are virtual bubbles that pop into and out of existence

In classical physics, momentum and energy are conserved, but heinsenburg spotted a loophole in the quantum realm. Energy and mass doesn’t have to be conserved, as long as it doesn’t have to exist for very long.

If you imagine the multiverse as these bubbles on a scale we couldn’t even imagine, our universe could exist in there. Just a fluctuation of energy that’s not supposed to exist for very long.