when will legalization bitcoin?
At the same moment you learn to speak English so we can understand what you are asking
why this does not happen?
Because different countries have different views on it and a different legal process and laws.
are there any countries that have legalized bitcoin?
Wikipedia is your friend:
https://en.wikipedia.org/wiki/Legality_of_bitcoin_by_country_or_territoryor already somehow now it is possible to legalize the income received from Bitcoin?
Again it depends in which country you reside.