As usual, you're wrong on every thought you have.
He will not resign or be impeached. He may not run again, but that's completely different.
History doesn't care about his tweets, or the fake controversies the media drives. History will note how the economy performed, how ISIS was destroyed, how North Korea became a positive situation, how illegal immigration was reduced dramatically, how the Iran deal was reshaped, how Israel was handled, and how the African American vote first began to swing back toward the middle.
Oh, and how the Trump phenomenon was the beginning of the end for the vaunted two-party, divide-and-conquer system that US politics is based upon. If you're not against this disgusting system, you're part of the problem and are perpetuating it.