Will chemical engineering is helpful to me in coming 15 years.

Chemical engineering has many more elements of science and maths in it. Depending on the college the syllabus are often very rigorous and demanding. Jobs related to the field are presently low, but the good thing is that with the knowledge you possess from your graduation programme you can get a job

Yes, chemical engineering will be very help in the coming years. You can get this degree. You will get good opportunities ahead.