Do not ever depend on bitcoin because we do not know if this thing is lifetime. You should bitcoin as your alternative and find a job that fit to the things that you really want. I do not depend on bitcoin because there is no assurance that you can earn money so I have my permanent job.
You are absolutely right, if we are dependent then we ourself going on a danger zone, Bitcoin is unpredictable as anything can happen in a night either a massive pump or a dump it depends on the situation of the market. It is always better to have it as a part-time job rather than preferring for permanent one.