Although it does not have 1 billion users, the actual number is 150 million, but it is also a huge product. Use crypto-currency to reward users who provide seeds and bandwidth is a great idea, very optimistic about the prospects of this project.
Bittorrent does have a natural advantage in content distribution, but unstable currency prices destroy everything. Imagine that you are using Bittoorrent's CDN service. The same content you only paid $100 yesterday, but today you need to pay $300 because $btt has tripled.