Just bought some Steem and powered up, plan on investing more with time. It's like any hobby, you spend money on books, subscriptions, sports, whatever. A couple hundred dollars now and again isn't very expensive and you can cash out in the future. It may even be a great investment.
I don't recommend you invest, but I see it the same way as buying books or music or anything you don't really need, except I can sell this with a return.