One of the biggest factors that keep Bitcoin alive is the development team behind it. What if this developer team breaks down? Are there any other people who can continue the project in technical terms?
The developers is the most important to maintain bitcoin to enhance it. So if the bitcoin developers has breakdown also the bitcoin will affected. There are many developers can continue bitcoin development when they know the bitcoin because bitcoin is a free sofware and it takes time to develop it because it will need deep study about it. But because of the age of bitcoin I think it will not happen.
Personally i don't see any reason why bitcoin developers will break down because Bitcoin is stable and have a high value is a BS if they abandoned it now. They have a lot of time to do this before. But still they choose to hold on to btc