when will legalization bitcoin? why this does not happen? are there any countries that have legalized bitcoin?
or already somehow now it is possible to legalize the income received from Bitcoin?
Check this link
https://en.wikipedia.org/wiki/Legality_of_bitcoin_by_country_or_territoryyou will find legal status of bitcoin in different territory.
Whilst the majority of countries do not make the usage of bitcoin itself illegal (with the exceptions of: Bangladesh, Bolivia, Ecuador & Kyrgyzstan), its status as money (or a commodity) varies, with differing regulatory implications.