It is something that Tolkien dragons love to do. It is their nature. It is simply something that Dragons do in Tolkien’s legendarium. In the hobbit, It’s in their temperament.
These Mythical serpents take gold and gems from men and mythical people, elves, dwarves, and anywhere they can discover gold. Also, they monitor their loot as long as they live (which means forever, except they got slaughtered). But the fact is: they like gold but never use a small piece of a ring. For sure they scarcely know a decent piece of work from an awful, and they can’t make a thing for themselves, not even a single piece of their protective layer. There was a type of ravenous, solid, and insidious worm called Smaug.
Make Sure you read The Top 12 Things You May Not Know About Legolas the Elf.
Why do dragons like gold? In the Hobbit, dragons are so greedy, and that joined with a failure to “make a thing for themselves” has determined them to crowd valuable things made by others. That is why they like gold.
Glaurung, one of the major dragons from the legend of the first age, collected a pile of gold and sat over it after destroying Nargothrond. Scatha the worm, another third age dragon, has a large golden hoard, which prompted a feud between the Northmen and the Dwarves. But why do dragons hoard gold if they don’t know how to use it? I think the answer is they don’t like gold. They just like to take it away from others.
Also, the Hobbit reveals to us that dragons don’t do anything with gold once they have gathered it. I think it is a steady update for a mythical serpent of his triumph. Moreover, they are narcissists and need a consistent token of their significance. Thus, they want the gold and fortune of their fallen adversaries so they can luxuriate in their magnificence.
Smaug, as a winged serpent of the Withered Heath, doesn’t claim his loyalty to anybody aside from Morgoth. Morgoth is the maker of these mythical beasts, actually, he didn’t really make them, however, he just ruined existing creatures inside them. As animals of Morgoth, there is likely a spirit that exists in their souls. Whether this is not yet confirmed but I imagine Morgoth taking care of reptiles to make mythical beasts similarly as he took care of a wolf to make Carcaroth.
Among other dragons, Smaug is a lesser bring forth of one of the manifestations of the ruler of Darkness, Morgoth. Morgoth, be that as it may, is toppled at the hour of the Hobbit and ousted into the Void. Be that as it may, his vindictiveness and hirelings remain. One of these workers is Sauron. So as to keep away from Smaug getting together with Sauron Gandalf attempts to slaughter him before Sauron returns his power. Tragically, Gandalf failed and Sauron has just returned in part and taken his position in Dol Guldur. Gandalf comes to know about this and promptly makes a move by having the White Council rout Sauron and his base in Dol Guldur. Dol Guldur is moderately near Erebor, so it is conceivable Sauron had an eye on Smaug.
Regardless of whether Sauron would have had the option to persuade Smaug to go along with him is another inquiry, yet so far Smaugs is only devoted to himself. He had no enthusiasm for the Arkenstone or golds other than it is the most delightful piece of his trophy.
Smaug was not satisfying anyone’s wish or prophecy. Moreover, the dragon just dropped upon the lonely mountain alone and his only greed was the gold. At that point, when this mythical beast first came to know about the treasure of Erebor, he drove away its occupants and amassed the entirety of the gold and other abundance of the Dwarf realm. After gathering everything, he secretly watched his treasure until the appearance of Thorin and his companions.
Smaug had no extraordinary enthusiasm for the Arkenstone other than it being a piece of his taken gold. In the book, Smaug flew into a fury when he understood that only a solitary two-gave cup had been taken.
The Dwarves profoundly esteemed the Arkenstone as a legacy of their kin. Knowing its own incentive to Thorin, Bilbo utilized the Arkenstone to deal with the Elves and others when they showed up to request their shares after the fall of Smaug. Moreover, the gem had no mystical properties, and having it doesn’t mean gaining anybody’s dedication or attention.