It is not necessary that one must have enough funds before investments must take place. The most important thing for one to have to start up investments is a steady source of income, then make plans how much amount of money will go in for investment and how mich will be for reserves and how much to be spend. Having a source of income, then make good plans and invest according to the amount you can afford to spend. Investments can only be stressful when there is no steady source of income and when there are no good plans on how to manage the money.
Right buddy, because in the end when talking about sufficiency of funds I think this is a slightly more difficult condition because regardless of our attitude in assessing the truth there will never be enough for financial matters because it will always be considered less so that when waiting for it to be enough then we will never invest because of our assumption that always feels less and wants more. But in contrast to those of us who can have a fairly maintained income every month and we can manage it well, it is certain that we will try as much as possible to set aside the income we have for investment if we have a good outlook for the future.
The advantage we have is that we are now aware that you don't have to be supper rich to invest in Bitcoin neither do you need to buy 1BTC at a go before you can start. Rather, you can start small even with as low as $10 or $20 per week which is doable for someone who have the passion and zeal to take his future finances seriously. I have read through the threads to see many fine suggestions that can enable the investor achieve this, one of them being the DCA method that I have seen to resonant with many people and is already yielding good results for those who apply it. So the question of financial sufficiency before investing does not come in because human wants are insatiable meaning that if we want to satisfy all we could ever desire before we invest, then such investment will never happen.
I am planning on separating my wants into the basic and optional so that I can balance how I allocate my income to accommodate my plan to invest in Bitcoin in a little but regular fashion. I have gotten the main information I need to get started so I have to implement what I have learnt and see how it feels to hold Bitcoin.