Sometimes many people fail to invest in bitcoin not necessarily that they don't have money to invest. Or that they need extra income to income to boost their investment chances. Some of these people are just looking for someone to act as a motivating factor for them before they can invest. Many people in here develop more interest in investing and hodling bitcoin because of their continuous visiting and reading of this thread, and seeing the knowledge that are being shared here and it motivated them. There could be several reasons why many hesitate to invest, but like you said above, investment is basically a choice.
Those are the people looking for who to blame in case anything go wrong with the investment. There are many with such character, they will never take responsibility for anything. In where I work, I still have some colleagues that still believe that Bitcoin will fail me. Funny enough, they are waiting for me to cry and regret investing in Bitcoin and always laugh at me when I ask them to invest in Bitcoin.
It is important to avoid anyone who have displayed some level of pessimism towards Bitcoin because investment requires some form of believe and trust, not forgetting the need to own up to the responsibilities.
Before deciding to hold maybe you should set some timeline on when you want to sell your stored asset so that you have something plan to hold and you will not get dismantle if you see something bearish situation in the market since it could possibly bother you.
I do not agree with you that setting the time to sell will help someone in holding especially when you want to hold for long term in accordance with our discussion here. Setting sell target means if the target is reach in two months the asset will be sold, I do not think this qualifies as the long term investment we are discussing here. I know that our plans and targets are different but when our mind is fixed on selling, we might tend to be agitated when the target price is not coming as quickly as we expect, this might be the beginning of a bigger problem.
Holding will only have sense if you have invested to much on good knowledge towards the market movement and you have a lot of experience about bullish also bearish situation.
It has been emphasized that it does not require huge amount of knowledge to be able to invest in Bitcoin even though completely knowledge is important and highly encouraged. To get started, you need just the basic knowledge thereafter you can build on your knowledge as you are building your portfolio.