By registering on this link http://bitcomine.net/home?r=wagon1231
You can mine your own bitcoin and help me a bit with the referral system.
At first you'll have a 4 day free coal miner, that will mine 1 kg. of coal a day(which is equivalent to 0.00010000 BTC).
You can buy other types of miners to increase earning rate per day.
Don't forget to use my link:
http://bitcomine.net/home?r=wagon1231