What bottom breadcrumb?
I know they're there... But I never use them. In fact I often forget they're there. However, this is not to say others don't notice them. I think I removed them once and had a few people point it out (much to my surprise).
I was once told there is a SEO impact in removing them, but I'm not 100% sure how true that is. One person told me removing them is like removing double content and so its good.... Another told me its best to leave it for bots to easily crawl your site once they pass the post content. So 1 for and 1 against.