I can decide to invest in bitcoin for one
Putting in discretionary income into your Bitcoin investment dosent automatically guarantee an investor more earning. See ehn Bitcoin is not like some kindd of savings accounts where you keep putting in money without having a clear plan or strategy. Cos if you do so you would end up losing more than you bargained for. That is why in addition to having your discretionary income every investor should also have a clear strategy like DCA (Dollar Cost Averaging) coupled with having an emergency funds...... It is only when this three combos are properly applied (which is having a discretionary income, emergency funds and then having a strategy like DCA), that an investor can boast of having more earning but then this earning mostly comes in the long run( 4-10 year+).
Off course before one will start Bitcoin investment journey they ought to have a mental picture of how they want their investment to look like because you can not just wake up and said you want to start investing in Bitcoin. Everyone is investing to have a portion of Bitcoin and also to make profit in the long run so it is something that one should be diligent about.
If someone have a good discretionary income and they are not making or utilizing it well it is same thing as someone ( investor) who doesn't have, we are the one that will make our investment look great by our action.
I believe all strategy are clear it is just the way we perceive things that matters though DCA method is very good in the sense that everyone can invest using it.
''He that fails to plan, plans to fail'' , it's an established fact. A newbie or an investor who just got up and enters into Bitcoin accumulation without proper thought, views and plans of how his investment journey or process would look like is already planning to fail because he wouldn't be in charge of such investment.
However, it first starts with interest to accumulate, because not everyone will invest in Bitcoin. Having gotten interested, your income is considered. You look at your available discretionary, after settlement of all basic needs and/or expenses. It is at this point you decide the strategy that you will use to acquire Bitcoin, either a lump sum, buy the dip or the DCA strategy. All of it can be used to acquire Bitcoin, but then, your available discretionary at the point will help you determine the best strategy to employ that will suit your investment at the moment. While a high income earner with a bigger discretionary income can for for buying the lump sum, and /or buying the Dip, a low income earner, with little discretionary income will rather go for the DCA strategy which allows him acquire Bitcoin slowly.
Talking about the importance of emergency funds, Such investor accumulating Bitcoin using the DCA strategy can also build up his emergency funds alongside side his investment journey from his discretionary income gradually while also looking for other means to improve income in other to improve his investment generally. The emergency funds no doubts helps to sustain and give you strength through your journey as it will survive you through lives rough period, making you not to tamper with your Bitcoin holdings and allow you Hodl for long.