We all know, there are 2 types of cryptocurrency
1st: centralized
2nd: decentralized

The difference between them, centralized cryptocurrency is controlled by a government or a company. It has value only in the specific area under company or government boundaries.
Decentralized cryptocurrency has no connection with any state, government

But, the government of some countries are against Bitcoin and some are ready to adopt Bitcoin. So what would effect on Bitcoin if any government approved Bitcoin as a legal tender?