What I have:

• SPS, since I accumulate it by playing Splinterlands and it does generate more SPS by being staked.
• A bunch of random staking coins on a communal Staking site... DASH, PIVX, SCC, FLITS, DIVI... most of them in tiny amounts I got from faucets at one point, or from my old arbitrage trading.

Though, nothing I would strongly suggest investing in currently. Not sure the crypto market has hit bottom yet, so there may still be some time to wait before investing in anything.