Why does the whole criptomarket fall? 
go mass correction.
Normally, when the price of bitcoin and other alt coins are pumping too much expect that there will be a mass correction and it will be followed after a week or two. go mass correction.It's known that many are contented with that price and many are starting to sell at that rate.
And you should be able to understand that the market is up and down, not all the time we are all in the green days.
I don't think there is nothing to understand and all because people be in the forum may already knew that bitcoin price is fluctuate always and it is up and down continuously. From this year starting onwards we see bitcoin price moves up and up again. Now correction happen, if you have enough fund means invest and buy bitcoins now to get the big profit.