If I ever came across these kinds of relics, it would become a family heirloom. The world would not know about its existence, of something that’s rare but common at the same time.
My thoughts are different if I came across something more substantial, like the Ark of the Covenant, but a spearhead is not something that I’d want to share with the world.
Their gov’t usually confiscates anything of value, which reinforces their regards towards their subjects: We. Own. You. Just what the left wants to say to us...
I believe that IF I had fortunate enough to have found that spear-point, I would have enjoyed it during my lifetime & then left it in my will to a suitable museum, with the understanding that it would be displayed, rather than sold.
(Fwiw, the last time that I gave a significant artifact to a museum, the museum sold it to a private collector. - I was NOT happy when I heard of the sale.)
Yours, ex-cadet