indeed it would be very good to do this and from an investment and profit perspective it would be huge, but not everyone can do that and maybe only a handful of people are able to do it.
not without reason, because indeed this is a long-term investment project and if you want to do a strategy like this at least you need a
lot of money and the money must be unused for daily needs.
apart from that, everyone has a different perspective, especially in investing, what the OP does is that he only focuses on bitcoin and maybe I, you or someone else will do different things because if you see this, I personally also want to do the same thing. same but finance doesn't allow that

and indeed I prefer to invest in bitcoin and some altcoins.
The highlighted part in your post does not stand true according to me because what perception you have in mind is wrong.As i have said earlier also is that if bitcoin prices are at $50k imagine then we consider that we should have $50k with us to invest but that's not the case man like you could easily buy it for small fraction also like $30-$50 keeping them above the transaction fees only and you would get them.Imagine people who have 0.5 or 0.05 Bitcoins with them they are enjoying at these time and will have huge profits in future.The fact that it would be less than whales holding many btc but you should invest whatever amount you are willing to do.
You said you diversified your portfolio with btc and other altcoins so are you sure they are going to give you satisfactory return if you hold them? Because for me bitcoin is only surviving coin but as we know preferences varies so not coming to that part.Finances will never allow us but we can manage some waste expenses to some investment purposes for securing our future.So have thought about them.