suggestions plz

So i have two domains and one hosting

1st domain is related to leak so i can make a new forum with it. ( It's a premium domain bought that for $1200 )

2nd is based on tech keyword so i can make a wordpress blog with it. ( It contains two words and 2nd word is tech )

i am good at writing article and reviews about tech. but i am not familiar with forums.

but i have only 1 dedicated hosting and i want to host one of this domain

so which will be better?