Thieves don't like ground anchors. Even a cheap one provides a level of security that a lock or chain alone can't. But fit a quality ground anchor, and you have a strong fixed point that'll deter the vast majority of thieves from even trying. In fact, a motorcycle that's secured with a decent lock, chain and ground anchor is only as likely to get stolen as a typical car. Ground anchors are a vital layer in any security set-up.