I say "the price people were willing to pay" instead of "value", because now that nobody wants to speculate with LUNA, it did fall down to its intrinsic value: Practically zero. Nobody needs it for anything besides buying and selling it from and to other people, which is not happening anymore.
Cryptocurrency is gambling, plain and simple. The difficulty that fiat currency faces is inflation, which roughly means diluting the economy that backs it too much. The difficulty with cryptocurrency is that there is nothing of worth backing it. Factor in the horrifying externalities, and its worth is negative.
For Bitcoin, the most popular one, on the order of 100.000.000.000.000.000.000 of hashes get calculated to mine a single block, multiple trillion per second. Within ten minutes, only a single one of those 100.000.000.000.000.000.000 hashes is actually used, depending entirely on luck. The rest are thrown away entirely. They do not form part of the final hash or anything else, the energy spent on them is lost.