Earning bitcoins can be done on all kind of methods but I think one of the best is signature campaigns due to the fact its easy and profitable.
You got almost no risks and its safe to do all the time.
Signature campaign is just one of the ways to earn bitcoin but it is not the best way because you can only earn a limited amount of money, maybe if you are a student living in a country which has a low cost for the expenses then you will be happy with that but if you have big demands in life you should upgrade your method of earning.
increasing potential by learning how to sell your skills or try to study trading and read the charts real money start from trading
and it can be so huge amount if you know where to position your entry and exit point.
Agree! Selling your skills you can earn a lot from it but the only problem now a days is the competition out on the internet because of the lot of the people out of there that is selling also their skills. So i do prefer trading!