Hi Wilhelmus,
Sorry for the delay in replying. I've just scanned your essay again and have appreciated your creative style which seems similar to my own. The "wrap around" universe is necessary to explain the idea of dark energy imo. Particles which convey a force of attraction can travel around a spherical 4D universe to arrive on the 'other side' and mimic a force of repulsion. This is a simple idea yet one which needs plenty of time of contemplation to fully understand. You said "..is reachable as a matter of fact on every point of the space/time placed at the limit of our causal universe" which rang a bell with me and sounded much the same as my image of a wrap around universe in fact. Funnily enough I no longer ask the questions of HOW and WHY. The threads are spinning in the first place because the energy outside the 4D bubble of nothingness which formed within it, is itself spinning and 'chaotic'. Again it's a simple concept and one which may lead some people to ask further questions, but for me it's enough.
I recently completed my personal t.o.e by realising that dark matter is metastable solid metallic hydrogen, created within stars and then expelled during supernova events. I have a hypothesis that some comets deliver this super material to the centre of the Earth which creates an extra supermagnetic effect which is undetectable by normal sensors but can accelerate spacecraft via the flyby phenomena. I can even show that the Bermuda triangle and Nevada triangle are directly linked to two areas in the far east which have similar reputations. It's due to the fall of the dinosaur extinction comet which is still falling towards the center and is now half way into the Earth's outer core.
All the best and thank you for your post. Most apprecaited
Alan