hey Rishab,
Every subject every study is good is you want to do them or your intrest is there to do. Again for every person there is an aim which they want to persue. if your aim also is in tge field if mathematics or if after doing bsc mathematics, it will be easy for you to persue your dream then i will suggest that you should go for this.
again if your strong field is in the math then you can go for this and can do better.
so i suggest you to go for bsc mathematics only if you are intrested in doing the same and want to go in this career path. However in my point of view there are a lot of scope in this field and you can achieve them if you want to do.
if you want to know more about this field and want to achieve success then feel free to ask.
thank you.