Bitcoin price is always so strange, two days ago also once close to $390, Paypal a message about Paypal made the price get up to $460, Then slowly decline. This lets the human mind is always anxious ah, buy or sell it ?Next, the price is up is down?No one can give correct answers.
It's more volatile because it's something completely new, the world has never seen such a thing before, so we are not sure how we should rate it.
Some people think bitcoin is completely useless and worthless, and therefore it has no value at all, other people think bitcoin is useful, scarce and very valuable. And therefore they think bitcoin may be worth millions.
Many people think something in between.
Many people now try to agree on the current value by buying and selling. They buy when they feel the price is too low (and they have fiat left over), they sell when they feel the price is too high. Of course this is not a stable thing, because the idea of high or low price changes constantly. If something happens that may change the personal opinion of everyone, but not everyone's opinion will change at the same rate. Some people may think the news is slightly good, others may think the news is perfect, and yet others may even think the news is bad. So they will change their value accordingly.
It will take a long time before people agree how much a bitcoin is worth, and than the price will eventually become more stable.
First we should probably care about the value, because at current value we are much too low to have enough value in bitcoin to serve the whole world.