You can earn money in either bitcoin or fiat and just set aside a certain quantity of those earnings every week in order to buy bitcoins, and cut back on other luxuries while you are building up your bitcoin portfolio... once you begin to have a decent btc portfolio (quantity will vary based on lifestyles and locations)
Yes, good idea. with lifestyle yo only need to have a table, a chair , a computer, a monitor and a bed to sleep when yur tired. not much more. put all other monies into the bitcoin and everyday do wat u can.
Everyone is going to make this kind of level of "luxury cutbacks" judgement differently. There are quite a few "get rich" books that describe the process of getting "rich" (or being "rich") as being able to live within your means to such a level that you put aside a sufficient quantity of your income in order to build a nest-egg that would be able to provide a mostly passive income to you for as long as you expect to live.
Accordingly, the higher percentage of your income that you are able to set aside, the quicker that set-aside money will become large enough that it could provide a sufficient enough passive income for you in order that you do not have to work anymore (if you chose not to work), and still to be able to live up to the lifestyle that you believe is sufficient for your own comfort.
Some people are going to feel comfortable with a passive income of $10k per year (and maybe they also live in a region that allows for such a level of income to be sufficient), and others may feel that they need to have $500k per year or some other variation in order to feel comfortable.
My thoughts on the matter kind of evolve, but I consider $3k per month (in today's dollars) could be minimally sufficient for me and my lifestyle, though that would be on the fairly frugal side for me to be able to sustain that kind of level on a long term basis; however, I would feel more comfortable with a level that is a bit higher that continues to allow me to maintain a decent cushion.. Surely, the higher the level above the minimum allows for a form of "icing on the cake," and I do like to be able to have my own splurges, here and there and into the future, if I so choose.
I have been practicing a form of setting aside and investing my set-aside monies for my whole adult life, and I personally believe it is a good practice that provides a good framework for getting and feeling "rich."