Advice Needed Suggestions on what to do with SeoNinja.club

So I purchased the domain this morning, SeoNinja.club not sure why just out of instinct and was going to do it up and sell it. But, not sure what to do with it yet. I have 3 ideas please suggest ideas for me as well, please.

My ideas were:

1) Make a WordPress blog, and fill with content all about SEO, tips, and tricks.
2) Get SEO Tools PHP Script off of Codecanyon like a webmaster/SEO analysiswebsite where members can check their website. Health checks and backlinks, also Keyword analysis.
3) An SEO Forum????

Any Ideas...