Most things are good in moderation, and bling on your car follows this rule.
Today, lots of enthusiasts aren't interested in making their cars perform better, they're interested in bling.
Like anything (except horsepower), too much bling can be distracting. It can also blind other drivers and cause accidents.
Besides, everyone knows the shiney stuff is usually just fake plastic chrome, so what's the point?
I say spend more money on horsepower, and not so much on bling. But that's my humble opinion.