The easy way:

100k is a lot of Steem, to minimize risk I'd turn 50% of it to other assets or crypto. I'd then power up the rest and sell votes until markets start picking up. This enables good enough rewards with zero effort. Then slowly power down and sell and buy back when markets hit the bottom again on weekly timeframe.

Hard way:

Actually use it to manually curate and embed great users to our platform, not caring that you're perhaps putting in a lot of effort while gaining less compared to selling votes, hoping to attract more eyeballs and other great content creators and people to our ecosystem, hopefully turning it into a little snowball that'll grow slowly.

100k Steem power gives a voting power of 2.2 dollars currently. That can do a lot of good in third world countries and has an impact even on western world.