I've seen lots (and lots) of those things, Carol, but I hadn't seen one until now that has a point on top. Did the silo in fact have a point on top, or did you add it yourself for effect, or was it done in error? My goodness, so many questions!
P.S. I hope you didn't do it merely on someone's advice. We shouldn't bow to the temptation, or cave in to the pressure, of taking advice from just anyone. Most of the advice one gets these days is not good. There are an awful lot of fools out there!