Should You Shoot At 24FPS or 60FPS?

I use to always just shoot everything at 60fps in case I wanted to slow it down. That was a mistake! Let me know if you have questions! Thanks everyone! @dannygevirtz MY GEAR! Camera // Canon C200 1DXmkII - Lens // Sigma Art 24-70mm f/2.8 - Lights // Aputure 120Dii 4ft Quasars- Light Soft Box // Aputure Light Dome ii - Filters // Tiffen Black ProMist 1/8