I would say it is completely normal for a FREE MARKET. Such markets are rare. The NYSE, for example has many many controls and levers that can be used to control the market and minimize swings. Nothing like that exists in bitcoin. The price fluctuations you see were present in stock markets of the 19th. century, but they are not allowed anymore and the markets will just be shut down if it crashes hard.
As long as we have a bitcoin economy based on speculation then this will be what it looks like. If we move to an exchange economy based on retail then we should assume more stability.
Well... It's completely normal on a FREE MARKET but only because the surroundings of this market are uncertain.
Otherwise there is no reason for the price to go up and down in a too wide range (the question would of course be "what is a too wide range" because that's completely subjective but you more or less understood me anyway)
I'd say the main reason for those up and downs is the fight between:
-People afraid of the fork and the potential future of btc. They wanna leave the boat cause they're not sure it'll continue floatting.
-People taken by FOMO seeing the small dumps as opportunities to get back on the boat.