Read this article carefully to know Uphold's stance on Voxel.

http://www.businessinsider.in/This-fintech-startups-biggest-business-is-looking-after-116-million-in-a-speculative-non-tradable-virtual-cryptocurrency/articleshow/51048186.cms

"Let's say Voxel goes to zero tomorrow - no one's interested in it, no one wants to buy it. That makes zero difference to us. We're simply holding it in wallets. We're not actively trading it and we're not actively backing the asset either."

 "Voxelus is a separate company not related to Uphold, nor has Uphold invested in it in any way shape or form. Uphold is simply partnering with Voxelus." -Uphold CEO Anthony Watson