Here's a simple explanation of the difference of the three currencies within Steem blockchain:https://steemit.com/steemit/@investingpennies/the-difference-between-steem-steem-dollars-sbd-and-steem-powerBased on that we can conclude which currency is the best to hold depends on your current view towards the blockchain:
- Powering up to Steem Power is the best if you believe in the long term value of the blockchain despite the bear market in past few months or if you believe the price won't go far lower than it is right now
- Holding SBD is the best if you believe the price of Steem will still fall further but still want to buy Steem/SP later when the price of those two are lower. This will protect your capital from the falling price.
- I personally don't see any point on holding liquid Steem right now especially in this bear market. Just use SBD if you need liquid currency within the blockchain.
Those basically summarizes my perspective to the three currencies when we are on a crypto bear market like the one we are in right now.