What is a sacred symbol for Buddhists?
There are symbols which Buddhists use as aides memoires for their meditation, symbols which represent aspects of Budhist teaching as culture but none of these is “sacred”. Sacred implies that the object is directly tied to the deity worshipped by the adherents. Buddhism has no deity, and hence, no sacred anything. Consider the Christian cross which is generally venerated as a sacred symbol. Christians get quite upset if you denigrate this symbol. Buddhists would not have the same reaction to interacting with any eight spoked wheel.