This is usual thing in the virtual currency world because if no fluctuations will done then what will be advantageous factor for us to make profit .
So it is better thing for us to have bitcoin and other altcoins price fluctuations daily .
Here i would like to give you some better suggestion to handle your profit and loss during fluctuations .
Today you have chance to make buy those coins which are at low price and also you have chances to sell those coins which you bought and today is at high price .
So always see the profit , because if you can make 1 to 10% profit daily then still it will be a better thing for a you as an trader .
So always see at those coins which are at low price , and don't buy those ckins whose price is increasing speedly because dump can start anytime .
My current trading is going with dgb coin which is at -16% and i am 100% sure that next day i will make +10%  easily .
So make activity fully of your trading work , instead to wait for long time .