One of the bast analogy I heard about Bitcoin as energy was from Pierre Noizat a Bitcoin OG who was in the Satoshi's mailing list and founder of the oldest exchange still active (Paymium in France) He basically explained that if Bitcoin is not energy per say, it's information which is kind of an indirect form of energy, or a potential form of energy. He stated that Bitcoin could be considered as an IKEA manual, which allow the user of the IKEA product to save a lot of his own energy while using it. So in that sens Bitcoin is energy actually, as a bottle of water is pure energy according to Einstein but not usable. Bitcoin is not energy in it's actual form, but it allows news forms of energies to be unleashed thanks to valuable informations it contains