For me bitcoin is just an extra income because when you don't have a skill to give then your source of income is limited . But when you have much skills to give I think it is possible to earn a decent amount of bitcoin monthly, And I think when some years passed by and bitcoin is widely used and known then more opportunities will also come.
I agree, if you have skills to offer you can earn good amount but like me i only earn extra money and not enough to sustain the needs of my family for everyday. of course i also dream to be rich with bitcoin maybe in the future if i go full time.
let alone to get bitcoin there are many methods that you can use if you have many skills then you can earn unlimited income in bitcoin, and certainly become rich is not it too hard? therefore hone your skills dude. because it would be very helpful to you