A low-income earner can also invest in Bitcoin, but it should not be done by putting all their savings at once. In fact, even a high-income earner should avoid investing all their income in Bitcoin. The simple and most comfortable way, especially for someone with a low income, is to use the DCA method. With DCA, you buy Bitcoin either weekly or monthly, depending on the amount you set aside for continuous investment. At the same time, investment should be done with discretionary income, money you have left after paying your other needs, so you won’t be forced to sell your holdings in difficult times.
That would depend on a few things like marital status, your age, financial stability, amount of savings, where the market is currently in the cycle, and a few more "concerns". But typically, if you have at least six months worth of expenses saved in your bank account, then you could invest the rest of your income.
But if you're single, with no responsibilities, and you see that Bitcoin's price is touching or under the 200-Weekly SMA, then it would be irresponsible NOT to withdraw all of your savings to buy Bitcoin.
I doubt that marital status has much bearing except to the extent to which you might need to consult regarding financial and/or other important life matters.. . but the fact that you are married or not seems almost irrelevant.
Personally, I haven't experienced such matters because I'm not married. But it would probably be safe to assume that a married man should be more careful with his finances now that he's making financial decisions for the both if them. UNLESS, he doesn't tell his wife about his Bitcoin investment.
Being single or married does not have an impact on someone’s situation when it comes to Bitcoin investing. I've seen married people invest regularly and their status looks the same to that of a single person. What matters most is how you plan your life and handle your finances, instead of your relationship status.
However, at the end of the day, everything will results from your hard work and good planning. If you can reduce unnecessary expenses and save a part of your salary, you can invest in Bitcoin whether you are single or married. What only determines the success is how ready you are to choose targets for the future over short-term profits.
I don't think there's anything wrong with telling your wife about your investment, some people claim that it's not everything you should tell her, but if you don't, who will you share it with? If she already knows your monthly salary and realizes that you're spending less than you earn, she will surely want to know where the remaining part of your money goes. Perhaps telling her will build more trust and understanding. If she sees that you're investing your money in an important thing, she may even assist you financially or in other ways.