Should I have something more than just FXAIX

Currently 19, I was able to invest 1,500 when I was 18, not much but it’s a start. 100% is currently Invested into FXAIX, and i’ve let ride throughout the 2025 year, should I continue to allocate my money to the FXAIX or should i look into other stocks? I will be adding more money this year, with my better job. It’s a **ROTH IRA,** forgot to mention