Despite the massive growth, advancement and advantages of Bitcoin and most crypto currency, why is it hard for most countries to fully accept it is or permit it's exchange?
Looking at global data, only a few countries have completely banned Bitcoin, while most allow it. This means the majority of countries have legalized Bitcoin, but its use is generally limited to investment and trading. As for legal tender, only El Salvador has officially made Bitcoin legal tender.
The main reason why most countries, despite legalizing Bitcoin, restrict its use to trade and investment is that they don’t want it to become widely adopted for everyday transactions. Such adoption could undermine their national currencies and make it harder for governments to track and tax financial activities.
..All the while when fiat is the thing that is used for said shady financial activities more than anything, the catch is that it is controlled by them, unlike BTC.