If you want to invest in Bitcoin you must have a source of income, if you don't have income you won't get money, and if you don't have money you can never invest. Now try to invest what you can afford to lose from your monthly income. You should not invest more than you can afford to lose, because investing more than you can afford to lose is risky. Investing more money than you can afford to lose will make it difficult to hold for long. So experienced people recommend investing in DCA method. Investing in Bitcoin now should definitely keep an emergency fund, which will help to solve various financial problems.