I think your best bet is BETA tokens.
https://steem-engine.com/?p=market&t=BETA
I don't hold any because I'm already heavy on Splinterlands cards; but for a non-player they're an excellent way to get some exposure to the game.
We're almost down to our last 250K BETA packs, I don't see them lasting til Christmas, so if you're looking to hold 12 months or more I can see them being an excellent option, with very little potential downside.