Time

Ignorance

Nothing

Lack of awareness of how corrupted the financial system is.

Shitcoins. They keep people weary of being scammed out of their wealth.

All of the above 👆🏻 and bellow 👇🏻

Too difficult to buy, hold and sell/use

The lack of the commoners understanding of money. For example 95% of people you ask have no idea why the Byzantine general had a problem and how Satoshi solved it.

We're not taught monetary theories in school.

Answering the question: What is money?