By alternative income I mean if you are involved in a job or business, a portion of discretionary income from that can be stored in bitcoins through DCA method and till your retirement you will have a huge stash of bitcoins.
I have thought about that too, especially since I do not have a company job where if you don't have it then you are not entitled to retirement, the truth is that because of the current situation in my country which is very bad, so it is better to do freelance work to be able to have or live better day to day, however, with bitcoin a retirement with bitcoin is much better than by any other method, I prefer to buy bitcoin gradually than to contribute to social security in my country where every month you have to pay money, instead of giving money to a government, it is much better to buy bitcoin and that's it, no matter what the price is, buy every month.