Given the unstable nature of cryptocurrencies, and the untraceable nature, would you suggest it wise for countries to adopt Bitcoin as a legal tender?
Governments love to steal money from citizens. The legal right to steal money from the people is called taxation. Via a currency, of which they can manipulate the purchasing power at any given time. Stored in a bank, where the government has 100% control of everything you own.
However, BTC makes it impossible for governments to tax you and steal from you.
They don't know what you own in the first place. So BTC is a threat to their income and to their power over people.
You could also convert most taxable assets, including real estate, to BTC and store it on a ledger outside of the crooked banking system.
Then banks and governments have no control over it at all. Can you imagine how angry this makes them?
No more power over people. No more control. No more debt slavery. No more wars (every war is a banker's war).
People would be free. What a disaster