The likelihood of Neptune crashing into Pluto or vice versa is astronomically low. The reason is that the solar system is an incredibly vast and mostly empty expanse of space, with vast distances between celestial bodies.
Neptune and Pluto are both members of our solar system, but they reside in different regions. Neptune is one of the gas giants and is located in the outer regions of the solar system, while Pluto is considered a dwarf planet and orbits in a region known as the Kuiper Belt, beyond the orbit of Neptune.
The orbits of Neptune and Pluto are well understood and have been studied for many years. Currently, their orbits are relatively stable, and the chances of them colliding are extremely remote. The distances between the two objects are immense, and their paths are well-separated.
It's important to note that the orbits of celestial bodies can be influenced by various factors, such as gravitational interactions with other planets or objects in the solar system. However, the chances of Neptune and Pluto undergoing a close encounter leading to a collision are highly unlikely.
Of course, it is always possible for the dynamics of the solar system to change over extremely long timescales, which could potentially alter the orbits of these objects. However, based on our current understanding, there is no evidence or indication that such an event is likely to occur in the foreseeable future.
In summary, the odds of Neptune crashing into Pluto or vice versa are exceedingly low, given the vast distances and stable orbits of these objects within our solar system.