2. Source of income
I want to add something more to you. Regarding the source of income I think one should not start investing only if there is a source of income. Your source of income should be a reliable source of income. There is a big difference between a source of income and a reliable source of income.
Source of income means any source of income, may be part-time or full-time but is not capable of meeting your complete needs or is not sufficient for investment after meeting the needs or there is no guarantee of how long this source of income will last. It is almost impossible to start investing or succeed in investing with such an income source. Investments must have a reliable source of income or an alternative source of income from which you will not need enough money to invest even after meeting your entire needs. There should even be an assurance about how long your source of income will last. If your source of income is viable and investable then we can call it a reliable source of income and eligible for investment. If there is no reliable source of income, I think it is better not to invest.
You must have a reliable income to determine a sustainable and long-term investment strategy and execute accordingly. Yes an investor can start DCA strategy if he wants to choose from any source of future income to determine his strategy. You should tell him that you can be successful in investing because if he can start with small amount in the beginning then later he will try to continue DCA strategy regularly.
A person's tendency to fear investment does not allow him to become a successful and long-term investor because investment fear works in him. In my opinion if an investor has a discretionary income to deposit at least $50 dollars a month he should continue to deposit bitcoins with that amount. If he has a temporary source of income then he must deposit accordingly as he may later make that temporary source of income permanent. The bottom line is that you need to start accumulating bitcoins in any amount because if you wait more for permanent earnings it will only be a waste of time and discretionary income may not be in your hand so you must take the right decision at the right time.
In conclusion I would like to say that an investor should not be discouraged if he has a source of discretionary income (in terms of investment).