Music is constantly evolving, and it is impossible to predict what will be the most popular genre in 20 years. However, it is likely that artists will continue to combine existing genres to create new and exciting sounds. Music streaming has had a big impact on the music industry, allowing artists to easily reach a larger audience than ever before. This may mean that more niche genres, such as K-pop, will become more popular over time. Technology will also play its part, with the introduction of AI and new instruments making the production of music easier and more accessible. In the end, the music that will be popular in 20 years is anyone's guess.