Well too early to predict but I dont think WAVES will not make it to top 10 in 2019, there are so many competitors that has more popular than waves to be on the list like binance, neo even there has significant updates on waves blockchain this year like waves smart contract its not enough maybe we can wait more years before waves can finally kick other coins with new features and more faster tps.
The competition will stay, waves having a volume of volume of over $100 million only showed how big people are supporting this project.
It'a about the volume because even if you have a great development and you only have supporters, you won't be successful, waves have that, and waves proven it. It will take time and 2019 is one year, anything can happen as anything is possible.
Remember, price moves because of us, if we want to make it happen, it will happen.