I remember when my cousin put the postage stamps from the letters they receive from their mother into the door of their cabinet. They are all the same and with blue color so it matches the color of the cabinet. They look very nice and so I ask for some of them and add it to my collection. I think there are seven pieces of them that she gave to me. It is the time that I started to collect stamps. They were mainly from the letters I gathered.
In the video is how they make stamps. It looks very simple and easy to make as most of the printing is done by the machine. only in the time that the postage stamps are to be designed that they need to make one and then proceed to the printing process. But even if if is that easy, this industry is so big because of the value or amount of money it produce for those who print, sell and manage it.
It became also a hobby that not those who use it for mail but also collectors add to those who buy the stamps and add revenue. It is a billion dollar industry that have been existing and increasing in value as time passes by. You can see many people who have thousands of collections of stamps they have been collecting for how many years. But there are stamps who are valuable but there are the ones only for pleasure.