Well we always have an opportunity to earn it, and if we can earn it then why to invest money in buying it, try to earn from multiple sources and save it for future.
I'm also earning bitcoins and never bought any bitcoins, but these days when price dropped a bit i wish i had some funds so that i could buy some bitcoins which could earn me some profits after some days, but i couldnt afford it.
If you are still not ready to buy a bitcoin and trading. Then you can do the way that you now do (finding bitcoin), because if you impose yourself it will not good for you and it will harm you. Enjoy the journey that you are going through and begin plotting your future about travel now. Cause if not then your life will not change
Not only signature campaign, you can also sell your services and earn descent amount of bitcoins, if you spend more time here you will find even more ways of earning it.