many says that bitcoin is better than cash but for me Cash is better than bitcoin in such a way in our real world because real money can buy food and anything in the real world while bitcoin doesn't .

I think bitcoin is the most popular, it is because of its million users and the big people who are involved in this kind of cryptocurrency and many gain profit daily that's why it is popular.

it is illegal in Asia, because bitcoin doesn't pay taxes in the government and the government are too angry of it because they don't earn money from it. It is the reason why bitcoin is not accepted in Asia.

cryptocurrency is like an asset, it is because cryptocurrency is a stock that can be sell or invest to earn more profit everyday. Also it is much profitable than our currency, thats why many of people invest in crypto.

It is good when the bitcoin make as payment system, because it is more comfortable to the user to pay in the different market out shop using bitcoin and the users will be more happy for it to happen.