Many people get/earn their bitcoin on joining in signature campaigns that has a high bounty here in the forum, Investing on bitcoin related businesses, Trading any tokens/cryptocurrency and convert to bitcoin, playing gambling on any gambling sites. But there's so many ways on how people get/earn their bitcoins. For me I get my bitcoins on joining only in signature campaigns that have a high bounty so that I have an extra income to buy what I need in my everyday life.