I noticed that the price of Bitcoin change much like all altcoins.
But the price of other traditional currencies like the euro, for example, are stable and do not change much.
It is the government that control their prices?
Of course all those fiats are government regulated currencies with the help of a central bank so they know when to pump and when to dump to bring about the stability of the currency. And because all fiats are centralized currencies, it is easier to stabilize its prices.
The bitcoins price changes more compared to fiat currencies it is because it is a perceived store of value compared to the fiat currency.
Bitcoin has properties that makes it similar to gold, it is controlled by a design by the developers of the core technology to limit its production to 21milion BTC, and that the complete opposite of the fiat currency which is managed by the governments who want to maintain low inflation.