Getting a full time job at an advanced age is not an easy thing as most of the organisations prefer young hands. Still, people with experience and skills and ability to drive a work force can get a job and some of the options are as follows.
If you have academic knowledge and an interest in teaching then the teaching or coaching in the coaching centres
is an ideal way of making money at this age. Coaching centres are always in search of experienced people in this respect as fresh people often leave them for greener pastures.
Another simple solution is to try to get a managerial job in a departmental store or mall or provision store where they also want senior people for keeping a discipline on salesmen as well as seeing the overall administration and work flow related to GST or other routine things. They may not pay you much in the beginning but if they find you useful and adding value there, they may soon increase your emoluments.
One other option is to join a group of people or agency providing paraphernalia for functions and arranging fairs and other such functions. There is a good demand of event managing teams nowadays and there is ample scope of earning there. Only thing is it is a bit cumbersome and requires a bit running also to manage the work. Many people are employed in this area nowadays.
The agencies managing tours and travels also require people to manage their bookings and other things related to customer services and coordination work. That is also a good avenue as they give good commissions on the work performed.
As you indicated that you have some interest in banking related work, you can try to get a job in some private financial and investment company where there is good work available related to the investment and financial consulting and advising. Some of them deal in stock market and commodity trading and that is also a lucrative area but you will have to go for some short course on learning the subtleties of this field.
The other option is to work online in internet in various survey sites or creative writing sites or other earning modes but due to the enormous rush in these places the returns might not be encouraging but yes that is one area which can be explored if one has such interests.
It is said that if health is all right a person can comfortably work up to the age of 75 though in rare cases people work even up to 80 or more. So, there is no problem as such and only thing is we have to be prepared to work hard and ready to learn things even at this stage of life.