Bitcoin. First introduced in late 2008, it is a specific currency in an electronic payment system that acts as an alternative to fiat currency. It exists only on computers and the internet. It is not backed by a government, and its price is not set by a centralized authority.
It can in addition be observed from Fig 7 that as the period band considered increases, the overall (bubble and non-bubble) coherence values generally get stronger, suggesting online factors have a medium to long term link with price.

Every cryptocurrency holder has a private key that authenticates their identity and allows them to exchange units. Users can make up their own private keys, which are formatted as whole numbers up to 78 digits long, or use a random number generator to create one.
When the market adjusts, the price shoots up. Large holders of that crypto can then cash in on the gains by dumping their coins, bringing the price down. Although exchanges know about these methods, stopping them isn’t all that simple, as the perpetrators know how to stay under the radar.