Power-up and then delegate 25SP to @steem-ua!
If you really believe what Steem can do in the future and that eventually it's market price will recover back to what once it was. Then the best thing you could do is POWER-UP what little STEEM you have and not hodl them as an Liquid asset(Saving/Transfer).
A lot of people don't know this but by just simply hodling STEEM POWER, you are passively mining SP. The more SP you have, the more it increases and the more your upvotes will be worth. As an example, someone like me who have 1kSP is gaining around 0.000005 SP per 3 second just by hodling it. Not much at first glance but imagine if you have more.
As for the worth of your upvote, 30SP might really not make that much of a difference. Fortunately there is now a new initiative in which it tries to help ALL accounts irregardless of their SP. Provided that one is constantly engaging with the community and have real followers (not bot followers). The more you engage, the more upvote you will get from them.
The initiative is called Steem User Authority @steem-ua and just by delegating the minimum of 25SP, you could get an upvote worth of $0.3-$0.9 depending on your level of engagement in the community. A much profitable trade than self-upvoting your post. Do check that out! :)