I had a question closed for the reason that "Questions on current or future market values, energy costs or service provider availability are off-topic".
Of those 3 possible reasons, it seems my question was closed for the "current or future market values" reason. Based on how my question was originally worded, I can understand why it was closed for that reason.
However, my question wasn't really about why GBTC and Bitcoin moved a certain amount in one particular day. My question is about why GBTC doesn't do what Grayscale says it is supposed to do on most days.
I have edited the question to reflect that, and I believe it should be reopened.
EDIT: I have found an Investor's Business Daily article that discusses why GBTC does not track Bitcoin. If my question can be reopened, I will post an answer citing the article.