No, Pluto will not crash into Neptune

Explanation: The diagrams show the resonance of Neptune's and Pluto's orbits another way. The upper diagram looks down on the solar system from above the Sun. The lower diagram "fixes" Neptune and the Sun, following the planets' orbits over thousands of years. Check how Pluto's eccentric orbit maps out a strange, curly path — but never comes close to Neptune. Instead, Pluto actually gets closer to Uranus!

Pluto

Image credit: This comes from a chapter by Malhotra and Williams in the book Pluto and Charon, edited by Alan Stern and Dave Tholen.