Well if he did come out and straight out say "Yes, Tesla did sell all of the bitcoin they bought just a mere month ago."
Then the feds would come knocking on his door for the same thing Martha Stewart went to jail for:
Insider trading.

They will be buying up on the dip if it goes below $30k for sure.

To close his twitter account he would need to pull a Trump-esque type coup at American corporate level to do that.