When i went for some successful large companies seminars, mind
you, not some young companies full of teens seminars, one of the
advice i heard was this
Keep your full time job, and build up your MLM income till the
monthly income is comfortable enough, or at least three times your
current salary, then you can consider quitting your job to go into
full fledged MLM.
If you mean, whole MLM eventually take over jobs, i would say,
unless the system change, regulations tightened and people mindset
and attitude change, i dont foresee MLM will take over, more like
an annoying ulcer in your mouth which refuse to go away, but not
enough to give you throat cancer.