Anyone has a theory on how it will work out?
What kind of energy you use for a proof of work machine has little to do with proof of work or its security. In case of Grin, even less so, since hardware is the bottleneck and main cost and not energy.
I have been monitoring development of nuclear fusion reactors for the last two decades because it is rather interesting. Unfortunately it is still very far away from becoming economically feasible since it is so hard to have fusion plasma magnetically contained for prolonged times. Vast computational power and AI allow for some improvements in this field, but not a lot. Neutrons that are produced by fusion are hard to contain since they have no charge and damage the very expensive reactor over prolonged time. I am afraid that fusion becoming economically feasible might still be 30-50 years away or so, even in an optimistic estimate.
that is true it could still be ways a way for now. and the basis is the cost for the electricity not where it comes from. If so, the nuclear fusion will eventually be free and everyone has one. with so, it will be much easier to remove blocks for the chain to respend.
No, that is the whole point. If cheaper electricity is there, everyone has access to it. Which means no one has a competitive advantage. Therefore it would not be easier to do do a 51% attack and do a re-spend even if electricity would become cheaper. Most importantly, since Grin uses ASIC mining, no-one would be willing to do such an attack since it would mean they first have to buy expensive hardware and then make that hardware lose its value by attacking the chain it is meant to mine on. This is why ASIC’s are much better for security then general purpose GPU mining.
On
It feels like suicide and egoism
hmm that is interesting. It is on both sides I can see it.. if energy is free, (if we get there without blowing Earth away), then it is proof of stake with miner being the sttake. there is no worry about cost for it otherwise.
I would not worry about it, electricity will never be free. Even if you could generate it very cheaply, it will not be free. The second part is the transport, because it requires quite a lot of network investment, energy will always have a cost.
Regarding nuclear fusion, we are still struggling to even have continuous operation and break even, so I would not worry about electricity becoming too cheap anytime soon 