I see Bitcoin as a small earning and thats all. I hope that we can make of course more money with Bitcoin, but that depend on the value. We will never know what will happen with the future so it is quite risky.
income just by working part-time in bitcoin. maybe he will produce greater earning when he was working full time in bitcoin

It's correct and just, for example, is my friend there are spending just a little part in bitcoin and getting enough income for that, but in this time they're spending a lot of their time into bitcoin and their income is rising more than their main job.
That is good, earning with bitcoin is great help to all users to increase their income every month that is why for me bitcoin is already part of my life and i think i will be rich someday if i will keep collecting bitcoin.