This is why BitTorrent and other P2P solutions were invented, but alas:
A. The RIAA, MPAA, and ESA have given these technologies a terrible reputation.
B. Nobody likes to seed. Some kind of seeding-based crypto would have been a great incentive if cryptocurrency wasn't also demonized by now.
Part of the reason people don't/didn't like seeding is that many residential lines are so terribly asymmetric. If you had 100down/5up, seeding your torrent at a useful speed was often enough to degrade your connection into unusability.