
Why governments in most of the countries do not wish bitcoin to be legal?
This has well been discussed on the forum severally, Most conclusion is more that the space doesnt need the government approval if the environment favours it. The idea is to be decentralized not under anyones control.

If bitcoin approve as legal in every country will there be any impact for users?
There will be impact both positively and negatively but the long term effect will not be so profitable as investors might want