Hahaha, I wish I had forced myself to get way more involved. I bought my 7 land plots for $14 each... why on earth didn't I buy more?
They've said over and over again that they aren't releasing any new land... and I have to imagine that once the Land expansion is announced that land would shoot up in cost. Land will be necessary to actually mint your own items and potions which you can sell or use in games. You'll also need cards to "work" the land, the more valuable the card the better they'll work that land plot.
So, honestly, my opinion is that land will keep going up, with a sharp spike around a land expansion announcement.
While they've said they're never release any more land, they did say that further expansions could be possible if the community votes for it using the SPS governance token... (but it would be way down the development roadmap). Either way, getting a higher airdrop value for the next 265 days seems like the smart move, however you want to do that.