I really think altcoins are a bubble just like dotcom bubble.
You know dotcom bubble was the caused because people rushed to buy technology companies shares.but the problem was that most of  these tech companies did not even have a product or even a plan to have a product.they were just in for the money they can grab.
I believe altcoins  are just like that.most of them are just fancy scams looking to get money.
And when that bubble bursts bitcoin will be shaked but will stand its ground.
dotcom bubble paved the way for real companies with a plan to grow.
And there came Amazon,Google,Apple.
Bitcoin will be very very valuable.
Right or wrong I am seeing pre dotcom bubble Amazon in bitcoin. the price of a Amazon share was 108 dollars, after the burst it was 8 dollars.Look at what it had become.
I know this is not a great comparison but this is my honest thoughts and belief in bitcoin.