Is visiting the moon again worth it?
Yes. Visiting the moon would be a great achievement and would mark 50 years since the first successful journey to the moon and back. But is it worth going back? We have already visited and found nothing, if they was something of significance on the moon (other than rock) then that would be a valid point for revisiting. Thus far there is nothing worth gathering from the moon that will aid scientific research and the visit would burn a hole in the US's pocket. The Apollo 11 spacecraft cost approximately 25 billion USD, but today it will cost a greater amount due to inflation rates.
Lets just say it costs $25,000,000,000. The US could use that money for the wellfare of the American people. There are a lot of problems within the US citizens' lives that could easily be resolved with 25 billion dollars at their disposal. Healthcare is currently not free, that is something they could invest in.
In conclusion, revisiting the moon isnt worth it. The cost would easily be used to improve peoples lives and will have a better use than revisiting a barren planet.