What pixel camera should I use to watch the concert?

There is no problem with pixels, and more than 654.38+million pixels are enough to play. Because the light is dim when shooting a concert, the size of the aperture is more important. It is best to have anti-shake, and the aperture should be above F2.8. If the aperture is small, the ISO should be raised when shooting. If you burn yourself, stay close to the stage, 200 mm is enough. It is not recommended to buy equipment temporarily. First, it is not worth it for a concert. Second, the equipment has a process of adaptation, and you may not use more equipment than you are familiar with.