For me government don't make bake bitcoin illegal worldwide because other part of the government is using it in their illegal work. Those that set it illegal are just scared that their wrong doings will be revealed once their people know about Bitcoin.

The government is simply afraid, because they will not be able to regulate the market.

Governments are adapting cryptocurrencies to their list with regulation and stuffs. Most of the countries that accepts bitcoin to their payment list/ legal currency.
Bitcoin does not violate anything regarding them but there is a possible thing can lead Bitcoin getting banned to some (Money Laundering, anything regarding illegal transactions.)

Have you ever tried to imagine a world where french kiss or handshakes are forbidden?
I guess it would be as easy to ban Bitcoin!

P2P transactions are made for everlast ^^ t'il the tcpIP protocol is legal.

Sorry haters 

A one good government also accepting the truth about bitcoin purpose,they also knows that many people who are actually benifited in bitcoin. It can contribute also to improve the economy of the country,that's why they don't want it to declare as a illegal.

First, putting all governments into one category is just plain ignorant.
The different types of governing systems around the world are so vast and different that there is no way you can just say they will all have the same attitude towards crypto.
For example, you think North Korea will have the same attitude towards crypto as France?

There are already a couple countries that are actively trying to incorporate crypto with the vast majority still neutral on it.
Even the ones that are "harsh" against btc have only put in some regulations to avoid scams.

You see, the thing is, the benefit of adopting blockchain tech far outweighs any risks in the future.
So instead of banning it, most institutions are figuring out ways how to incorporate it.

Can you imagine if a country decided to ban the internet in the 80s because they thought it would be "against" them?
How far behind would that country be even if they decided to unban it years later?

Same with crypto.

It is a nightmare for the government to some extent, but cryptocurrencies have captured the world. Gets difficult for authorities to control the use of them nowadays.

You are absolutely right. Government had seen how transparent Bitcoin is and see no reason to make it illegal. Those that set it illegal are just scared that their wrong doings will be revealed once their people know about Bitcoin.

I totally agree with you

A) Because they are scary to completely ban something so innovative and that could benefit their economy
B) Because they don't know how to actually ban something like bitcoin, as these new technologies have always found a way to survive (look at thepiratebay still up after years)