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A cryptocurrency that has storage-oriented utility will have a hard time if they did not make its usage as simple as possible for the mainstream. Another way to utilize their potency is to collaborate or integrate with any platform that connects their requirements with the storage-based cryptocurrency.
For example, most of the platforms need to compete directly with Google Drive, Dropbox, or Mega. So in order to thrive, they need to have a smooth UI/UX for the users. Or, say their platform is used to incorporate other systems, like IPFS. One thing that I take a look closely beside the coins that are already mentioned here is Sia. Siacoin has been existing for a long time, and they are still struggling to develop the platform to make the regular Joe use the platform.