I really agree with you man. A lot of people overthink it and end up doing nothing at all, waiting to know everything before they even buy their first BTC. But the truth is, you will never know everything. Even those that have been in the space for 5+ years are still learning every day. Bitcoin is deep, and it keeps evolving.
I personally believe that starting small is one of the best ways to actually learn. You feel more involved when you have something at stake, even if it is just $20 or $50 DCAing.
Knowing about Bitcoin is good but waiting to know everything before starting is a waste of knowledge, an investor ought to put that little knowledge they've got about Bitcoin to practice and learn more from their experience, learning is something that remains constant and the more you practicalise on what you've learnt the more perfect you get, in the case of Bitcoin investment, when you start, the more buy and keep hodling the more you get to understand what it's all about.
Also, everyone can't be on the same level financially, that's what some people don't understand, cause someone started with a $100 doesn't mean you must start with same amount whereas your discretionary doesn't permit you to, I guess that's another reason why some people keep waiting, Bitcoin investment is done according to one's discretionary and if yours can't allow you invest $100 weekly then starting with $20 or a little more is not a bad idea, it's better than waiting to get $100 before starting.
Knowing Bitcoin is ideal thing to do as investor since somehow we need to understand on how something works. But its wrong if they keep waiting for more learnings and monitoring because they are wasting lots of opportunities on that matter. Market is moving that's why each miss opportunity might cause something to them. That's why if they really aim to invest on Bitcoin then do it now and don't wait for someone or something that brings you confident to do it.
Everyone cannot be on same level and they should not think about other people portfolio. What they need to focus is to build their own portfolio then focus on their accumulation. There goals is more important rather than paying attention on other accumulation or other nonsense things out there.