In my personal veiw bitcoins would survive ,
Bitcoins shocked the world by its success and it's high value , it is the first crypto currency that reached $4000 and is ruling the digital world, it showed people that crytocurrencies are worth investing .
Bitcoins has a huge community behind it and the number of users are increasing by the passing time , more and more people are getting to know about bitcoins by social campaigns and other sources .
If  the prices drops real deep then people would buy BTC as they trust on it that it would gain its value again.
there are alt coins like ethereum that has the potential to come up but they would also find it almost impossible to do so . bitcoin is a settled and stable crypto while ethereum is a new project.