Why so confrontative? You don't need a lot of money to start. And it's not about playing around. Once you invest $100 you are forced to understand and to learn what's going on. Much better than reading some guides without having any goal (the linked guide is still good).
I have no income at the moment and I will likely remain in this state for the next two years. I am not sure that my savings will last me that long, so I am erring on the safe side while still being interested in learning about the current technologies.
Not everyone reading HN has money to spare, or a job that allows them such luxuries. Not everyone who wants to study blockchain is interested in making money just because they can.
