Both gold and bitcoin are a variant of "proof of wasted energy" or more euphemistically "proof of work". Why that makes it valuable is beyond me, but it isn't really a new thing considering the historic value of gold being much more than its utility as a material.

Maybe I didn't explain it well, gold and bitcoin are the 'memory' of used energy, they are not energy sources themselves.

I think of them as representations of the idea that energy is (currently) so abundant and cheap that we can waste it on mining things like gold and crypto, a fundamentally ridiculous concept in terms of real actual human needs.

Once that stops being the case (when fossil fuel starts running out globally), the whole thing - cash, gold, crypto, stocks, bonds, property - everything falls apart.