Often times homeowner's insurance is inadequate for covering the loss of a bicycle due to deductibles being set at 1% of a home's value. As posted in another thread some means of theft deterrent should be utilized when a bicycle is unattended, but there is no totally secure method of preventing theft.
Other posts have mentioned bicycles being destroyed by vehicular collisions.
I am hopeful that an alternate form of insurance exists for replacing a lost or damaged bicycle. I have not found a suitable alternative and hope that somebody else has discovered an good alternative.