Why do you think Iago chooses to be silent as the story concludes?Also, do you think he considers himself to have “won”? Lost?

Iago, in his plan to ruin Othello, gets more than he bargained for. I believe that even he can't comprehend the results of his plotting. Desdemona is dea by her husbands hand. At no point in the story do we see Desdemona's death as a motive for his scheming. The man he sought to ruin is dead, as well as the wife he set up. Iago's own wife is dead.... He sought to ruin another, and he ruined himself. I believe that in the end, Iago had nothing left to say.