I Think I have found the answer on Fusion. If it's Cold or Hot, doesn't seem to make any difference. It seems to me, that Fusion is always endothermic process.
This means that "cold fusion" is a real thing. But it, or hot fusion can't never produce energy.
I have a new Idea about the conditions where the fusion of matter in big scale could be reached. If there is some ongoing research, I would like to join.
My thoughts are based on observations; I think these "forest rings" are a sign of cold fusion on Earth;
Here's more technical paper about them available;
There is "hotter" version of this fusion visible in Venus;
Here's m own papers;
They are quite difficult to approach, as the way which lead to me to this idea about Fusion was quite long.
If I have figured this our correctly, the research of LENR is not qoing to bring us solution to energy problems. It would just complete our understanding of physics. The only concrete new thing which I see possible to be revealed through further research is superconductivity. The most of other results will be just closing out the stuff like antimatter, Dark energy and black holes.
I think the best information about Fusion is provided in Thermosphere, or more precisely the 85-120 km height above Earth. Here's one teaser picture about my observations;