worthless securities. The implication of the term is that certificates of stocks and bonds that have gone bankrupt or defaulted have no other use than as wallpaper. However, there may be some slight value in the worthless certificates themselves for collectors who prize rare or historically significant certificates. Also, in computers, a picture or other graphic design used as background for the desktop instead of a solid color.
a picture or pattern displayed as a background in a windowed operating system.
worthless securities. The implication of the term is that certificates of stocks and bonds that have gone bankrupt or defaulted have no other use than as wallpaper. However, there may be value in the worthless certificates themselves by collectors of such certificates, who prize rare or historically significant certificates. The practice of collecting such certificates is known as scripophily.

