Bitcoin and alts have seen a massive correction since they peaked in December 2017. Some people have predicted this to be the death of Bitcoin and of all the other coins that are collectively categorised as shitcoins in crypto terminology. But this is not the first time Bitcoin has seen this level of correction.
first of all you can't even begin to compare bitcoin drop and altcoin dumps!
for starters bitcoin drop stopped about 2-3 months ago not to mention that the bottom of the price was reached February (6 months ago) and price has not gone below it ever since. but altcoins have been getting dumped and going lower and lower each time setting a new bottom and still breaking it a week or so later.
second no body predicted "bitcoin death". don't confuse bullshit on the internet with actual "prediction"
as for death of altcoins, it happens every day, it is not news. take a look at altcoin graveyard and you'll see.