I'm not going to vote until you correct your grammar:
The correct way to spell it is
1. Satoshi's an individual who started bitcoins on it's own.
Options
1. Satoshi is an indivudual who started bitcoin on his own.
2. Satoshi is a group of indivudual who started bitcoin together but under the same name.
3. Satoshi is a project group in NSA who started bitcoin with the ambition to test an on-line currency that easily can be monitored
Sorry English is not my native language, but I try to write as correct as I can.