I would say it depends on what you're looking for. getting a PHD gives you really good exposure to research, at the expense of finances, generally speaking.

so if you're really into what you're studying, and can't think of doing anything else ... by all means get a PHD. but if you're hoping to get that BMW M6 before you're 25 ... better off start getting a job 1st

if you're even asking this question, i don't think you should get a PHD for your subject.

hard work is not enough to grant you one. there must be interest ...and alot of it ! if you've ever wished you never took biotech , then sorry to say you'll probably drop out of the PHD program due to it being "hard" , "boring" or "irrevelant" .

studying for anything should be for a sole pursuit, to be the best at it.

A PhD is just a stamp of approval. Some may slave over getting one, others may just be awarded an honorary title. You don't have to be a genius to get one.

My personal opinion is that anyone going for a PhD either has an undying interest for the subject, or he/she just has no idea what to do after the last degree !