Wait Bitcoin is traded in this forum?
Yes.
You can create a thread on currency exchange board. If you want to exchange to naira, you can create a thread about it on our board here. You can Brainboss service. Igebotz also has is providing such service.
Does that mean that the spike in the price of Dollar in the parallel market is as a result of Inflation or the high demand for dollar or both?
Inflation is part of it. People are demanding for more dollar.
Is there a way a thread can be I don't know Deleted?
You want to delete a thread. No need for that.
But there are sometimes you may want to delete a topic, example is when you make some changes and nobody has posted on the thread. You can edit it to 'del' or 'delete' and report it to be deleted. Report is at the lower left corner of each thread.