If you want a whole bitcoin the best thing is to invest. Some people gamble for there first coin but its risky. You can also do a signature campaign if its possible of course.
i think invest is good idea if we know where the good way to invest, i recomended to build gu mining, im sure in 1year we can take ROI then after it we can get more money with free just pay the electric fee.
Building up your own gpu mining is going to be expensive and what if op or other people who are reading here doesn't have enough budget for buying that.
Well only rich people or people who have decent job are the ones who are able to afford that. But for those newly introduced to bitcoin.
This is going to be a challenge, it's either they can sell their services and skills or go sell something that they are not using anymore.