Because first of all, we don't like central banks and corrupt governments, and would love to see them lose their monopoly. If you haven't noticed, they aren't so happy about Bitcoin and all the other coins out there. And they will try to stop them. Orbitcoin's goal is to be used on darknets like I2P, Tor and others as well as the normal Internet (clearnet) + in Orbit. At the current moment it WORKS with SOCKS over I2P/Tor. Native support for I2P should be in place soon. It's an advanced Scrypt based PoW/PoS coin and has some other nice features, too.
This is by far the first crypto coin to truly help science. The Orbitcoin Society mission goal is to support open source science and bring some of that POWER back to the people!