I'm kind of amazed how Filecoin managed to create such a hype, even though its nothing more than a whitepaper right now. I mean, there are already 2 or 3 coins

I'm kind of amazed how Filecoin managed to create such a hype, even though its nothing more than a whitepaper right now. I mean, there are already 2 or 3 coins that are doing something very similar and already have at least a working prototype (eg Siacoin, Storj), or have an interesting algo like Proof of Storage from Burst. Is there anything that makes Filecoin superior compared to the other's, or is it just that its VC-backed?