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.
The money used for investing in Bitcoin should be different from the money used to maintain a standard of living. If you feel your income is not enough for you and when you use them to invest you will be broke then it is not advisable to start investing yet. Before thinking about allocating money for investment you should consider paying your bills, sorting all necessary things including food and little expenses even to the extend of keeping some money for your emergency fund.
As experienced investors are there measures that can be imbibed by new investors with little capital to help boast their capital. Some will want to mention patience which I will agree to but in situations where the money is needed to meet an emergency need how to you tackle such situations. Your formula might be a saving approach.
Yes there is a way to gradually accumulate Bitcoin with low amount and it is risk free and good for starters. The method is DCA. It is easy all you need to do is decide if you want to DCA weekly or monthly then you choose a specific percentage of your income and allocate that amount consistently for a period of time. The DCA method is slow to accumulate but it is the safest method because Bitcoin is highly volatile and other strategies can be affected by the volatility of Bitcoin.