What to do with my platinum card?

I recently got a savor card ($3,000 limit) which has been great but now my first card I have a platinum ($400 limit) is pretty much useless to me now due to it’s low credit limit and no rewards. So what do I do with it? I’ve been just spending around $10 a month with it just for utilization but I’m debating about just taking the credit hit and close it.