Depending on your level of your emotional vulnerability, the amount of the stuff creating the barrier, like jenga pieces, grows or shrinks - but usually grows. Somehow it is regarded as a marker of a safe haven, like a castle moat.
Sadly, though you may feel this is a protection for you or your family, it is an illusion. Besides the basic common sense security measures we can put in place in case of emergency, the sheer volume of material goods we may feel represents security can in reality do nothing to truly alleviate risk in our lives.
What it does do though is serve as a life stopper. It prevents you from living your life to the full, living as a free person not a prisoner, inviting people, relationships and experiences into your life. It holds you ransom to a life worth living. It denies you the head space necessary to embrace all these avenues. In short, it becomes your master.
You may shrug this off as something that does not apply to you. I hope that is the case. You may know someone you care about who suffers from this problem. The clutter can manifest itself in many forms - books, food, alcohol, dishes, clothes etc.
Our culture is manipulated into believing that material acquisitions represent a whole lifestyle, invincibility and even happiness. We all know this is not the case but the pull is so strong to buy into that way of thinking. Sit still for a moment and consider the qualities you possess as a person that are proof of your personal security capacity. If you draw a blank, ask someone who knows you well and loves you. You will be pleasantly surprised at the inner rock you really are.
Time to sort it out - most probably with the help of a trusted support system (friend, family member, professional). Step by step, no ripping off the band aid here if you really want it to be sustainable with minimal trauma. The point is, recognise it and begin. If only to begin you will feel immense relief.