It could also be part of a strategic move. By hiding his bloodline, he can surprise his opponents in battle. They would underestimate him based on not knowing about his true powers, and then he could turn the tables on them when the time is right. This gives him an edge in combat situations.
He might use some special jutsu or seals. For example, he could use a sealing technique to suppress the signs of his bloodline. This way, others wouldn't be able to detect it through normal means like sensing chakra.
One possible reason could be that his eyes hold a special power that he doesn't want others to discover easily. For example, it might be a new type of Sharingan or a unique ability related to his Uzumaki heritage that he needs to keep secret to protect himself or those around him.
Maybe he wants to surprise his opponents in battles. He could be waiting for the perfect moment to reveal his full power and turn the tables on his enemies.
One possible reason could be that he doesn't want others to pity him. Naruto has always been a proud and strong - willed character. His scars might be a reminder of painful past experiences, and he prefers to deal with them privately rather than showing vulnerability to others.
Another reason could be related to his personal growth. He might be trying to master the power of the eye in private. Naruto has always been one to face challenges alone at first. By hiding his eye, he can focus on understanding and using its power without distractions or the pressure of others' expectations.
Well, in fanfictions, often the plot takes a different turn. Naruto might hide from his family because there could be some sort of misunderstanding. For example, there could be false rumors about him being involved in something bad. And he might think that his family would believe those rumors without giving him a chance to explain. So, to avoid the immediate confrontation and judgment, he chooses to hide.
If Naruto got a new bloodline in the fanfiction, it could strengthen his relationship with Sasuke. Sasuke, always interested in power, might be intrigued by Naruto's new abilities and see him in a new light. They could start training together again to understand and master the bloodline, which would bring them closer as friends and rivals.
Since Naruto has a strong connection with the Nine - Tails, he could create a bloodline ability that lets him tap into the Nine - Tails' power in a more controlled and unique way. Instead of just using the Nine - Tails' chakra for strength and speed boosts, he could use it to create a sort of chakra - based armor that not only protects him but also amplifies his own jutsu when he channels his chakra through it.
He might want to protect himself. If others know how smart he is, he could become a target. Enemies might see him as a greater threat and go after him more aggressively.
Well, with the Omnitrix bloodline, Naruto might gain the ability to transform into various alien forms. This could enhance his physical strength, speed, and even give him new jutsu - like an alien form might have unique energy blasts. His combat style would become more diverse, and he could surprise his opponents in new ways.