learn new traits
new skillsThey start earn much more money than a single career person .
.... wish you present this slighlty differently;
They help earn more money than a single career.It is always better to master in two or more traitsskills.
ByThrough continuous learning , one can update his knowledge dramatically.
Secondly, learning throughout the life surely makes a person successful in his work area. By learning, one can update his knowledge dramatically. Moreover, he can apply it in to his area of work. For example, learning sophisticated software and skills in photography, a photographer can depict beautiful photos. In contrast, studies always help the individual to improve his confidence level sharply and can tackle the problems easily, which happen in his duty.
Here, I find less alignment with your topic. Actually you try to show "learning" as an advantage of multicareer, but it is not explicitly conveyed.
Overall, you display excellent writing skills :)