1) would've other crypto's survived during that time ?.
2) Why do Bitcoin survive during crypto winter and other crypto's finds it difficult to cope ?.
I ever made a thread about crypto winter on my local board and lots of discussions there in detail about why this happened. But, even despite discussing many pages, we get 1 point, if hold and patent is an important things to solve the winter problem. As we know, bitcoin price is always back in ATH, we believe that because we have experienced it in 3 times. And, I know you still doubt it because you were just born today.
Don't worry mate, there are many like you today. they were worried like you before but by over time, they are immediately convinced.