I obtained
this list from a quick search.
In general, it's worth it if you enjoy the work, which is difficult to know until you are there. It is not enough to enjoy the subject matter. I would suggest a placement if you haven't already done so. Before you sub-specialise, you will be expected to deal with all other forms of clinical (eg not laboratory) medicine, and may have little exposure to haematology bar a couple months of rotation in medical school or as a resident. It is not uncommon to have a change of heart regarding specialty.
You will be paid from internship (eg a proper job) at a reasonable rate (usually around 60-80K full-time). From then on, you are expected to study, sit exams and develop yourself professionally outside your working hours. As a guide, the exams are usually much harder and easier to fail than in medical school. Completion of training in allows for an increase in flexibility of how and when you work.
Closely related would be nursing and scientists in the field, but they would unlikely to earn that much early on. You could look into pharmaceutics. I'd suggest a search of jobs on the internet for their respective salaries to give you an idea.