[Edited out]
These days I like to think that guys have to put greater than 35% of their income into bitcoin for more than 4 years to really get to a place that he might have enough bitcoin in 4-ish years.
Guys who are putting between 15% and 30% into bitcoin each year, they still may well end up taking close to 2 cycles before they might start to feel that they had put in enough.
Guys who are putting between 10% and 15% may well take 10-15 years before they start to feel that they have enough or more than enough in bitcoin.
So the results depend both upon how much you are able to put in and how much you really think that you need, and you might have to wait some time, even if you had already put in a lot - like 1-2 years of your income/expenses, before you start to feel like you can start to sell some of your bitcoin.
At the end, it boils down to how efficient is someone's financial system. A person may be willing to invest his 35 percent in bitcoin but has a basic responsibilities that would take over 60 percent of his income before he could start figuring out his Discretionary income for investment and further making provision for his emergency funds, backup funds, discretionary expenses, reserved funds and then investment funds which could all be at 15-30 percent depending on how he plans or how extravagant he spends of which he also needs to regulate.
Another fellow may also invest his 35 percent in bitcoin and still not have enough bitcoin in 4 years. Someone's 15 percent could be larger than another's 30 percent or 35 percent of even 60 percent and more. A basic income amount is a huge factor determining the amount of bitcoin a person can be able to own after 4 years, however, having a large income does not automatically imply having enough discretionary income for investment.
Bitcoin success to some extent goes beyond the amount a person earns unto the amount of money such person spends. This is why I think that a person should aim at keeping it consistent for at least above 4 years or better until after retirement. Bitcoin investment should be a retirement plan because it will help to preserve your wealth and after your retirement, you can start withdrawing from your bitcoin when you no longer have any other sources of income or getting too old but not selling off all at once and withdrawing periodically does not also stop you from buying more when you can afford to do that.
What works for Mr A may not work for Mr B. So it's better to focus on consistency within your financial capacity and also making sure that you're true to yourself at all time.