I don't see any good in Hodling aside from it being withraw-able anytime.
Power-up for sure. Since I have belief to Steem platform then there is no point for me to HODL and wait till it skyrocket to the moon. I'd rather convert it to SP and use it for curation and earn some rewards from it. And while doing that I'm also able to distribute the tokens to the authors that I think are creating good quality contents.