It will not happen if the price of bitcoin still at the high price. Because only bitcoin that have really big price for each coin. To replace bitcoin, that crytocurrency need to be more good and have a new 'thing'
I think the key is not only at a high price because it is very possible that other coin will also have a higher price if they have more users, therefore users will provide the most important role for bitcoin if bitcoin want to continue to survive of all obstacles?