It depends on what you think the future of Steem will be, if you believe that the price will go up inevitably you are liable to make a lot of money, not from voting but from the gains you make because the price went up. If you are a HODLer and the price goes really up like $4.00 your vote will be $200.00 plus curation and you actually have a nice income, if this did happen I of course would at least sell enough to recuperate what I spent to make sure I will not lose in case of an apocalypse.

But that is best case scenario, in reality we are on a cliff edge right now and nobody trusts Steem that much so I doubt anyone would put in that kind of money.