yes it may happen but i think bitcoin has reached to a level where it is difficult for any other cryptocurrency to replace it or reached to its level because it takes a huge time to evolve and bitcoin takes almost 10 year to reached this level. in other words we can say that it is the mother of all cryptocurrency.......
very difficult for me. because bitcoin is an icon of the digital currency today. all depends on the price movements of bitcoin. so I conclude that bitcoin will survive and remain will be a digital currency that is most widely used.It doesn't depend on price movement, it depends on the proper development of the core.
Satoshi was a decent developer and he thought the block size should be unlimited. All this SegWit and Lightning code might be fine and dandy running on an open chain. But choking off the main chain is hurting the growth and adoption of the currency. The blocksize should be 2MB at a minimum. If you do the research, you'll see the 1MB was not supposed to be static. It was intended to be a temporary solution only.
If this doesn't get fixed soon, Paypal will begin looking like a more attractive option to both merchants and customers.