If you choose to delay your Bitcoin investment you are not losing anything at that moment, some people choose to delay there Bitcoin investment because they want to build a strong emergency, reserve and float funds first, yes you can start your Bitcoin accumulation and also be building your backup funds which is your emergency, reserve and float funds at same time, but one thing we most no is that is not every human that likes to rush things some set of people usually don't like doing two things at a time especially when it involve financial resources, it could be that his or her financial strength can't carry both Bitcoin accumulation and building a backup funds at same time, so if a person is delaying because he wants to take his time before going into Bitcoin accumulation is not a bad idea, it is better to start late and accumulate enough later, than to start quick and end up stopping and even selling of all your Bitcoin because of financial issues, if you know your financial strength can carry both building your Bitcoin and your backup funds then you can do it but if it can't then build your backup funds to an extend before starting your Bitcoin accumulation.
Buddy what do you really mean? though I understand the points you are trying to make but realistically I don't think it's right for anyone to delay his or her investment based the reason you gave, mate time wait for nobody and I will tell you for free that Bitcoin investment requires a constant inflow of income not necessary huge amount but an amount that you can invest with daily, weekly or monthly consistently and still have some funds left for personal use, buddy if one doesn't have something that is generating money for him or her then it a different thing but if someone has a constant inflow of money irrespective of the amount, I think is not advisable for such person to wait further.
I have gone through your conclusions, but if may ask what if an investor who's waiting to stock up a reasonable amount both for the said investment, emergency fund or reserve fund before he or she can invest get discouraged along the line, the aforementioned is the danger involved, though emergency funds are also needed to be present for an investor to scale through without stoping halfway but whichever way, anyone taking this step must be very deciplined in other not to deviate from the main goal.