For many different reasons Globalists and other groups use Symbols/Symbolism. The purpose & interpretation of them can vary, so can what is used for/as the Symbols.

Here are some of the reasons why they use/do it:

1) [Communication]

(To the group itself, other groups & the portions of the public that are Aware/"in the know". This is also used in MSM/Media/Entertainment/Pop Culture & even in some Events)

2) [Territory]

(Current or former groups marking where they are/were and/or where they operate(d) out of.)

3) [Subliminal Messaging/Mind Control]

(Used as Psy-Op's against other groups, Indoctrination/Control of its Members & Brainwashing/Control of the Public)

4) ["Magic"]

(It's existed for a long before "Meme Magic" was figured out. The "Illuminati Card Game" is a example of this)