Thorin is dubious by Gandalf's choice of burglar, according to the first Hobbit film An Unexpected Journey, and so much of the film centers on Bilbo attempting to prove himself to the dwarves in many unexpected ways. He has lost the spirit and the heart that makes him such a wonderful character. He has to go through many difficult and unpleasant times in order to discover it.
When Thorin's group travels through the lands surrounding The Shire, they encounter three large trolls who have come down from the mountains and started causing trouble, which includes Bilbo being sent to retrieve the dwarves' horses, and he admits to it in front of such respected and respected dwarves.
Bilbo decides to take this opportunity to demonstrate his strength to the group of trolls that he is not afraid of. Then he would have smuggled the very mutton off the spits, purloined the beer, and walked off without themnoticing him. Others who are more practical but with less professional pride might have inserted a dagger into each of them. The night might have been spent pleasant.
Bilbo climbed up the courage and placed his tiny hand in Williams' huge pocket, almost as big as a bag.
Bilbo chooses to take this item simply because it appears to be the easiest to carry, and to show his bravery and deft hands in front of the dwarves as the reward for his bravery and deft hands. But here is one thing that isn't exactly what he expected: Trolls purses are the mischief, and this was no exception. William turned around at once and grabbed Bilbo by the neck, before he could duck behind the tree.
Many trolls purses are actually able to speak. Whether they are some weird living creature, or whether they are magically enchanted objects, they are all capable of vocalizing and averting their owners on just such an occasion as this. Bilbo should have left well enough alone, and returned to the company without disturbing the trolls.
Bilbo is the only one quick-witted enough to keep the trolls alive while Gandalf gets them out of it, according to Gandalf's correct statement. This is also shown in Peter Jackson's film portrayion of the scene, where Bilbo tries to distract and redirect the trolls' attention while Gandalf works his way towards the sunrise. The grey wizard then exposes the trolls to the sunlight, who automatically turn to stone, in the same clearing