Just think, get a couple of your Pokemon set up on the bench, or a card that requires three or four fairy energy cards to attack and Brilliant Arrow can then do 180 damage a turn, every single turn
So the better question is not is holo or reverse holo worth more? The better question is which set, which card, which printing, and what condition? That answer is much less tidy, which is rude but normal
Well, if you want to play Ob Nixilis in Modern, thats a bulk rare with a better version of the same ability for two mana less
Unlike booster boxes, you are purchasing single cards to enjoy them in the present moment, singles are too volatile with too many variables in play that could result in them losing value suddenly
However, this card can also serve as a powerful engine and enabler for sacrifice-based decks, discard decks and any decks that might want proliferate