For investment or to increase the amount of investment, I will focus more on increasing the source of income. If you have to invest in yourself to increase your income, then it will be a good thing to do. Investing in yourself to upgrade yourself may be the right step rather than investing in Bitcoin with scarcity. This will increase your chances of increasing your income and provide additional funds for Bitcoin investments.
It is true that to increase the amount of investment, attention should be paid to increasing the source of income, but it may not be easy for everyone to increase the source of income. I think those who have enough opportunities to invest, that is, those who have enough money to invest. Maybe increasing income sources isn't very important to those new investors at first. The most important and most useful aspect for new investors is to create a backup fund. If the source of income does not increase, then the amount of money you have, i.e. we should invest regularly through the sources of income we have. I am constantly investing regularly with my smallest source of income, increasing the income festival has not become very important to me yet.
I have a slight disagreement with one of your sentences. think it would be better for beginners not to have a mandatory requirement for a backup fund at least for those who are just starting out with Bitcoin and are feeling lucky enough to have a small fraction of their holdings. Initially, he might be very emotional and if you start to scare him about floating cash/backup funds, he might lose interest in investing. In the later stages they should definitely understand the importance of the need for a backup fund for long term investments and I think they should consider it in the later stages.
My recommendation to new Bitcoin investors is to start with at least one wallet and it is better to have a few than zero fractions and to start by accumulation a portion of your discretionary income in Bitcoin and set aside a portion for a backup fund.
You can assume that most investors will not be able to increase their income sources, so I recommend gradually increasing the amount of Bitcoin deposit from that amount of disposable income. In the long run this will help him to build a decent portfolio from a small investor to a successful entrepreneur. DCA strategy is the best and most optimal method for those working and relatively low-income investors.