There is only one way that I would advise someone to hold sbd, which is if he or she thinks the STEEM price will drop, hodling sbd would increase the amount of STEEM that steemian would be able to power up.
This would have been something to do like 1 year ago, atm it's not worth it and the best option is to, just like you said, powerup. I've started using 100% power up on my posts.
You're right and I agree, power up is the best option, especially if you're planning long term. Thanks for dropping by, have a nice day :)