Starting Bitcoin investment with little capital will be very challenging mostly if that happens to be the major survival option of the investor. And in cases where the investor plans on using the proceed to solve their needs they might end up selling when the price have dropped just to settle the pressing need of that time.
We know that investing in Bitcoin must use safe money. Safe money means the money that we don't use for daily needs. We invest whatever the money when we have an excess money. The amount of money depends on the individual, everyone can be different. What we must understand that we never force to invest in Bitcoin for a certain amount of money. Investing in a small amount of money is okay, we can increase it gradually. The most important thing that we don't depend on the money, so we can spend it for Bitcoin investment without any doubt. For urgent needs, ideally we must have savings on the banks (fiats). It should be the priority as the solution when we have an urgent need. Don't sell our Bitcoin to solve the problem, especially when we must sell the bitcoin when the price is decreasing a lot.