Even if Bitcoin had no utility or tangible value, its extreme rarity would still make it valuable to collectors. People like to collect all sorts of things, and it’s the same for scarce goods: the hunt for rarity is an intrinsic part of the fun, even if the item in question has no real-world use. For instance, super rare baseball cards are a collector's dream. Not only do they usually sell for huge sums at auction, they can even fetch the price of a new home for someone who owns a large collection. So it's not like a lack of intrinsic value is going to prevent Bitcoin from being valued by collectors.