I think it is very possible, users more and more so that bitcoin transactions become slowly, someday it will happen so make your sent transaction failed, bitcoin price will go floor and bitcoin will be replaced by another cryptocurrency.
One proof that people would just settle with what we currently have with bitcoins is the fact that the majority of people aren't switching to using any other coins and remain to use bitcoin as the "safe-haven" of their money. If their altcoins have been converted to bitcoins, they know that their money is finally safe from the volatility. Bitcoin is still volatile but it is not going to dump to insane levels real quick.
People trust bitcoins and most are loyal about using it. Even me, even if I know that there are better coins than bitcoins when it comes to features, I still choose bitcoins because this is where the majority of people (that use cryptocurrencies) store most of their money.
For now bitcoin is still a favorite for internet users, I agree, bitcoin will remain popular for a long time, that's because, people who use bitcoin not only to facilitate transactions, but because can earn more money from bitcoin, bitcoin is not just a transaction tool, this is a business, This is what makes people comfortable with bitcoin, and the popularity of bitcoin is still a magnet for Internet users, because we all know, more and more bitcoin users, the more bitcoin demand, the more transactions, it proves that Bitcoin is still the top choice in transactions and to earn an income