Quote from: bei on January 29, 2018, 01:35:09 PM

What makes the Bitcoin price rise up and down? Not a few months ago, the BTC price hit $50,000 and within few days it started to fall down. What makes the price change that quick?

I think the main reason is that bitcoin prices are falling due to supply and demand. These two factors determine the bitcoin price. Bitcoin prices have fallen sharply recently due to the influence of China and Korea, which are adopting a bitcoin policy in their markets. It is possible that many altcoins have attracted quite a lot of investors to give up the bitcoin. So bitcoin prices have dropped dramatically.