Not only history proves it but I think the whole world has heard what Bitcoin is. Indeed, this price is quite expensive for some people, but not for me, what you said earlier, by looking at Bitcoin's initial track record, of course we all automatically think that the price in the next 10 years will be much more expensive than now. This asset is very rare and much contested in the world. This is the importance of the dca technique that we use, to fill our pockets with bitcoin, apart from that we also need extra patience to take the desired profit.
The sad thing about this is that people have heard about bitcoin, they know it has given great profits, they also know that bitcoin will most likely give great profits to anyone willing to hold their coins for such a long period of time, and yet they will refuse to invest in bitcoin.
Simply put, despite having the same knowledge that we have, they are not willing to take the risk, and once those 10 years were to pass and our predictions became true, they will lament not investing in bitcoin when they had the chance, but if you were to ask them if they will invest in bitcoin on the near future, they will still refuse to do it, with the excuse that it is too expensive.
I won't feel sad about it, rather I will feel annoyed. Not sure if they are lazy, dumb, or what.. but they deserved what is happening at them. There is no one to be blamed here for the hardships that they experienced about their life but only their selves. Even though they heard and know BTC too, I won't say that we have the same knowledge as them because if they do, then they will also invest in BTC. The word ' knowledge ' is too vast you know.
I think there are still people who are like that which are annoyed already about their ignorance and they say to themselves that they will not repeat the same mistakes again. This is also the reason on why DCA buying method was born.