Why Are High Tiers Rising?

I’m so confused as to why gravity gun, grenade launcher, and ice katana are rising? Like did they all simultaneously get a buff? From what I’ve heard, grenade got nerfed and had ppl tell me it’s “not that great” (but have also been told vice versa) and the unstable verdict makes me question the reason as to why it would rise? Same with ice katana, I asked previously if I should obtain ice katana and lots of people said it’s just for looks, but there are other items that are great for appearing “rich.” I haven’t heard of any sort of buff for gravity gun. It’s just rising?? Like the weapon has remained the same since it came out has it not? I don’t mean to come off in aggressively, I’m just curious. I’ve been trying to get grenade launcher for 3 months now, and when I have 50k tokens, no one wants it anymore…💔 I’m devastated!