In this case, It is mentioned that Mike Beaskey has paid $800,000 but it is not mentioned that he has sold at $900,000 it is just a market value of that date.
But just to show someone or for own assumption,
Mike Beaskey should report $100,000 (12.50% profit) income for 2016 if he sells that price otherwise, he need not to show any income if he does not sell.