from a quora question

As any asset, bitcoin price against fiat changes everytime. For bitcoin price change is more and more high (volatility) because less capital than other assets (gold for example), market is not regulated and there are a lot of speculators and people who don’t know anything about bitcoin.

on bitcoin infact price is highly driven by cycles fear/euphory of people trying to speculate without having knowledge of the underlying technology.

The truth is that there is nothing to worry about. You should just have a vision of at least 5 years and not be concerned about daily movements. bitcoin is not an asset for trading, it is an asset for holding.