your title doesn't match what you said.
and it is normal whenever there is a pump happening in altcoin market. traders' money go to where the pump is and in the past few weeks it was in altcoins that were getting pumped and now that they are getting dumped again, the money is exiting altcoin market.
it is like a cycle that happens every now and then.
Not sure why this forum considers the link suspect. the above link is accepted and is a screenshot of the cnbc article.
because the URL is a 4 letter word (i am guessing CNBC.com) and you are a newbie rank.
market cap is not a valid factor of comparison and when it comes to cryptocurrencies it becomes even worse factor for comparison.
read what Market capitalization is and you'll understand.