Hello there! I have a friend who works with bitcoin and it seems pretty interesting. The whole thing seems somewhat confusing for me, could you guys give me a quick rundown of what it is, how it works, how to earn it, etc? Would be very helpful! Thanks 
Bitcoin is a form of digital currency, created and held electronically. No one controls it. Bitcoins arent printed, like dollars or euros theyre produced by people, and increasingly businesses, running computers all around the world, using software that solves mathematical problems.
you can learn more here http://www.coindesk.com/information/what-is-bitcoin/ thank you. i hope this help you.