Yes. In fact, many people have already moved towards scalable cryptocurrencies with far better features than Bitcoin itself. Cheap micropayments and quick transfers are already possible with altcoins. However, I believe that it's good for Bitcoin to scale, since it'll be able to grow in ways that were never thought possible. If it scales, then most people would use it at a greater level than altcoins themselves. The only advantage altcoins have right now, is their quick speeds and low costs. However, Bitcoin can achieve the same results if it scales with the Lightning Network.
Since many altcoins have already scaled, there shouldn't be any reason to worry about Bitcoin scaling to the world. It can be used as a store of value, due to its limited supply and unparalleled security. At the cost of slower speeds and higher costs, it could be worth securing your money in Bitcoin if it provides you with unmatched security unlike any other cryptocurrency in existence.
Nonetheless, time will tell us whenever the Lightning Network will become adopted by the world or not. Just my thoughts