That’s one of the most interesting things about these tiny insects.
Final Thoughts
That strange object on your bedroom floor is most likely a case made by a small case-bearing moth larva, such as a household casebearer or plaster bagworm, although the exact species cannot be confirmed from the photo alone.
The rough, debris-covered tube and the dark portion protruding from one end are consistent with the way these larvae live and move around inside their protective cases. (Ask IFAS – Powered by EDIS)
If you find just one, simply remove it and clean the area. If you begin finding many, inspect closets, carpets, rugs, and stored natural-fiber materials for a possible source.
Have you ever found one of these strange little “cases” in your home? 
What did you think it was at first? Tell us in the comments!
