I do get my Bitcoin from doing works. I offer my service and in return they pay me in Bitcoin or cryptocurrency which then I convert to Bitcoin. I do use my Bitcoin for my daily expenses and save some for future use or future profit.
I think we have the same ways on getting our bitcoin. I also get and earned my bitcoin by rendering my services to promote their project so that a lot of people will going to invest to it. I don't invest money but I invest my time and effort in promoting their project. Well it is very effective and very profitable.