Yeah… different strategies for different folks. I mainly wanted to hold onto some SL stuff because I'm running a bunch of bot accounts. If there hadn't been the option for passive income via bots, I likely would have sold 100%.
The release of SPS and staking was a nice perk as far as I'm concerned, because now I have two ways of earning passively through SL.
But I do think you are correct re: spreading yourself across multiple Hive games. It's probably best to keep to just a few, and hopefully pick the ones that will pay off in the end.