Goldman Sachs advisor says 'Today's Cryptocurrencies Will Go to Zero, But Stronger Digital Currencies May Still Emerge' and this time they can be right. And pretty much is okay to relate today's situation with dotcom bubble back in the 2000's.
I can see two ends for this, whether development becomes a priority and actual value and usefulness are created for the big cryptocurrencies we handle right now, or the bubble explodes. If it explodes then a new type of cryptocurrencies will emerge, although I don't believe these would follow Bitcoin principles.
Article: http://fortune.com/2018/02/07/bitcoin-price-usd-prediction-goldman-sachs-cryptocurrency/
I am also agreeing that not all coins will survive i am pretty sure shit coins will die. The best coins will survive.
Now for the sentence that it will not follow bitcoins principle this people do not get it. Bitcoins principle are what make cryptocurrency attractive. Being decentralized and can not controlled or influenced is the main principle. I bet they hated that because they are used on controlling financial institutions.