There are many people in this world who do not know about Bitcoin or the cryptocurrency market. Although this field has been established and developed for nearly 20 years, it has only recently been recognized. There are still not many countries that accept Biitcoin, so it is understandable that not many people know about it. Most countries do not want their people to know about Bitcoin. To be honest, the birth and development of Bitcoin directly threatens the position of fiat currencies as well as the banking system. Therefore, most countries are very cautious about Bitcoin and the cryptocurrency market.
For a long time, people have always known Bitcoin in utility media as an asset used for fraud. They try to give bad information about Bitcoin and intentionally ignored positive aspects and developments of this market. So, it gradually creates stereotypes for people who do not understand Bitcoin, leading them to lose interest and give up learning about this market.
They are cautious about bitcoin because it is so new, its volatility is also something they worry about...many other reasons but I don't think the government is afraid that bitcoin will affect the value of fiat or banks. I also had this thought before but then I don't think the government is afraid of bitcoin, because if it really threatens the value of fiat money or banks, they will join forces to destroy it or impose restrictions harsh ban on it. And look, most countries today have gradually adopted bitcoin to a certain extent.
In my opinion, the development of bitcoin is very fast and amazing, it is not as slow as many people think. We cannot expect that with just 20 years of bitcoin's existence, everyone should know about it, a revolutionary change may even take hundreds of years before being fully accepted. If you compare the ages of bitcoin and humans it is a significant amount of time, but compared to other assets like gold and real estate, bitcoin is still just a baby. You can't expect a newborn to run, jump, or have adult relationships.