Here's why:
* Historically: Gold has been a symbol of wealth and power for centuries.
* Material Value: Gold is a precious metal with intrinsic value, often used in currency and investments.
* Figurative Use: We use phrases like "a golden opportunity" or "a golden heart" to signify something valuable and desirable.
While other connotations exist (like beauty, luxury, or even greed), wealth and value are arguably the most prevalent and ingrained in the word "gold."