I see that when the price of btc rise higher, it'll become higher for investors to buy as you know they are seeking for means to minimize risk.
But, the few that'll have such wild risk appetite to buy will become the winners in the long run. I can see that in the future btc will be owned by few powerful people and powerful institutions.
If that investor has a lot of money, they will not have a problem buying bitcoin, even if the price is getting higher because I think they already know that bitcoin will be worth buying and hold for a long time. They can accept the high price, and they know the consequences of buying bitcoin at a high price. Some of them will just wait for a while to see the price is down, and if that happens, that will be their best time to buy bitcoin in a big amount.
With the increase of bitcoin prices in the future, I think only a few people who can have bitcoin in a big amount, especially in an early adopter, will be very happy to see they can make a lot of money. In the future, not many of them can have much bitcoin, but they will try to buy from a small fraction of bitcoin and don't sell it if they don't have many bitcoin.