that is what happens when a bubble bursts. a lot of money exits and the prices come down. and in case of this market that is filled with thousands of billions of coins a small drop wipes out a huge market capitalization from the whole market just as a small pump pushes it upwards.

this is a classic altcoin dumping season that has been going on for a couple of months now. it is nothing to talk about really since it is not new. it happens almost every year.