I don’t think that’s realistic. Harry’s acknowledged that he needs to mature into a worthwhile adult in order to be able to save the world, and he’s not going to gain the experiences he needs to do that (or indeed maintain a reasonable standard of mental health) by becoming a full-on hikikomori.
It’s also worth noting that now that Lord Voldemort is gone, with Mad-Eye Moody, Amelia Bones, and the Hogwarts professors at his side, there is very little that can threaten Harry unless he goes actively looking for it (which, naturally, he will not). The Invisibility Cloak is useful, but it’s not the be-all-end-all of protection, and letting it sit in his possession when Hermione could use it to do heroic things is a rather large opportunity cost.
I don’t think that’s realistic. Harry’s acknowledged that he needs to mature into a worthwhile adult in order to be able to save the world, and he’s not going to gain the experiences he needs to do that (or indeed maintain a reasonable standard of mental health) by becoming a full-on hikikomori.
As dxu notes, Hermione is likely to use it more than he is. And if Harry does go out, he’ll do it with Hermione, and can borrow her Cloak.
It’s not “Harry will never use the Cloak again”, it’s “it’s Hermione’s now because she’ll get the most use out of it.”
It’s also worth noting that now that Lord Voldemort is gone, with Mad-Eye Moody, Amelia Bones, and the Hogwarts professors at his side, there is very little that can threaten Harry unless he goes actively looking for it (which, naturally, he will not). The Invisibility Cloak is useful, but it’s not the be-all-end-all of protection, and letting it sit in his possession when Hermione could use it to do heroic things is a rather large opportunity cost.