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I only have a LEO stack because leofinance.io generates ad revenue (and leo.voter generates HIVE revenue) which is used to buy LEO off the market.

You said you have SPS and BRO.

Can you explain why they may go up other than speculation?

SPS is going up because staking it increases rewards for playing the game. As more players play the game, they're going to want to stake to earn more rewards.

BRO pays out small amounts of Hive and I think they do buybacks as well

I find the SPS staking aspect interesting.

Going to look more into that and whether it's sustainable :)

If you ask someone like @goldmatters, I'm sure he has a lot more reasons why you'd want to own SPS.

I just passively follow Splinterlands, so I'm sure there are other reasons as well.

Just know the inflation is currently high.