And one of the reasons Bitcoin is unstable is because Bitcoin in the world is owned by a few group of people, probably the early adopters. This means that a single person could decide to release huge amounts of Bitcoin into the market at any moment, completely upending its value.
Also, the price of Bitcoin can also change drastically as countries and financial institutions adapt to the idea of cryptocurrency. For example, when one of South Korea’s biggest banks tested out the technology it caused a spike in value. On the other hand, when China announced plans to crack down on sketchy Initial Coin Offerings (ICOs) the value of Bitcoin dropped, and the same thing happened when a South Korean government official said the country might ban cryptocurrencies altogether.