Do you mean like this one? :
I have done a boomerang and probably trapeze with it but, as you can see on the photograph, the originally pointy tip is easily blunted from a strike on the floor. These were surely low cost tops.
Duncan also had a little top with a tip turned with the body (Little Champ). It was printed with different company logos and probably given away for free as promotions:
One day I will make a gallery of spintop tips. This is from a 1998 article on Reminisce magazine about the Burlington Museum: