Worried your bike will be vandalized or stolen, not if you live in Japan!
Japan has a genius system to ensure your bike is safe with its robotic underground bicycle garages. The ECO-Cycle, developed by Giken Ltd., can store up to 204 bikes 11 metres underground and the whole process takes only 13 seconds. A month-long membership costs about US$216, and students receive a fifty-percent discount. Still not cheap but better than finding only your frame when you get back to your bike stand.
Keeping safety in mind the garage is also “anti-siesmic”, after all, if an earthquake hits, you’ll need your wheels!