The positive side is that for example 50% of developed and developing countries make regulations for their people to utilize blockchain technology and apply it in their daily lives, this is a positive thing where local governments try to educate their citizens about technological progress in the form of blockchain systems, without realizing they will need a tool or an embodiment of the blockchain system in the form of digital currency made by the government.
The negative side is clearly this will create instability in the value of real currencies, because the digital currency in the form of crypto will often not be able to occupy a stable value at a certain point if the crypto that has been made follows the global crypto market share.
From this, I concluded, Crypto is decentralized and cannot be governed or controlled by one of the parties, for example, which controls the most BTC, still cannot. Because this crypto is anonymous, no matter how great a government makes crypto because it wants to have a stable price it is still classified as local crypto and only applies to certain regions.
This is a good opportunity for some people who want to invest not globally, but it can also be a threat if all countries agree on the use of crypto with the strongest rules then it will be a benchmark for the price of the crypto.
As we know, Bitcoin and Altcoin can be said to stand on their own and develop naturally.