Yes it's possible for bitcoin to become worthless, if someday the bitcoin price dropped to under $10, i'm sure people will stop using bitcoin anymore. Many people will leave and it makes the bitcoin price more low and low, soon the bitcoin will be worthless. I hope these things will never happen though.
I think what you imagine will not happen, we see the world of technology is always developing and providing human needs in a practical way. of course with the presence of bitcoin a new discourse for the transaction world later. and I think the pros and cons at the beginning of the process are common