Will bitcoin die is a different question than will bitcoin stay on top. Certainly, it has the strongest current community and the "its theirs to lose" ground in the market. But, it needs to keep up with innovation and demands. Being lazy, or too rigid in their design to innovate is the biggest danger. Just think about these few examples for precedence:

• Myspace had the same ground before Facebook stole it.
• Blockbuster video had the same spot before Netflix innovated themselves ahead of them.
• Barnes & Noble sat on top before Amazon blew past them.

BTC needs to continue to innovate and show trusted leader advantage. Otherwise there is plenty of room for something like Cardano or Litecoin (and many others) to come in and show their on top. Also, if a big country like China comes out with a currency that is backed by banks and fiat, its game over for any of these options as the free flow for money and spending will trump technological advantages.