If many people who are complaining about Bitcoin's price being high can think of a time when Bitcoin's price may go even higher, as you have said, they will stop thinking of the price as high and just start buying now. They will then see Bitcoin's current price as not that expensive.
We have so many persons around the world who would at this time see Bitcoin as expensive and that is because the are looking at it that they have to buy one Bitcoin if they want to get on in investing in Bitcoin but if they get to see it that they can actually get it in bits and while they use the DCA method of purchase maybe they would have a better taught of acquiring of Bitcoin. I have mostly been of the taught that Bitcoin is never too expensive but only expensive days or years after you have refused to buy it when you did had the opportunity to get on with investing in Bitcoin as at the time you had the opportunity to.
The current price of Bitcoin is definitely going to be much more than what its going to be years after now only that now we may wan to see it as expensive but by then it will be even more expensive than it has been now that we didn't buy because we are looking at it as been too expensive but then it is going to be even more expensive than it is now. so for me i say Bitcoin is only expensive tomorrow and never too expensive today.