I will say yes because if you work for someone and the person pays you in Bitcoin then you have gotten BTC without a capital to invest. There are different ways one can earn BTC. The labourer must have his wage at the end the month. That is one way of earning. Then donations or dash. Someone or a friend can dash/give you BTC just like the normal way they gives the Fiat currency. These are some the ways you can earn Bitcoin but the second option nis not regular probably it might be once and also there are other ways to have BTC.