Bitcoin still use by less people in the world and only 2% of world population have use and know with bitcoin, when bitcoin have popular maybe become digital currency payment world and many people will use bitcoin as currency payment, need time for getting many people want to use bitcoin during bitcoin have higher price will give big chance how to make bitcoin become legal currency payment.
Legalization is price independent. The whole problem is that Bitcoin is decentralized, its P2P, without third parties. The government has banks that can be monitored and used for its own purposes at any time, which cannot be done with the Bitcoin ecosystem. This is why bitcoin is being accepted so slowly. Be realistic 80% of all states - a corruption and bureaucratic system