There is a lot of disagreement about what the price of Bitcoin will be in the future, how long this high rate will remain.
The way I think this is going to happen: as the supply is got short and the demand is getting bigger, the price of bitcoin will be increasing, I dont think people will be able to buy up all the bitcoins there just as the way some people sees it. Buying and selling goes on every day and you will always be able to buy, but at a higher price, and that means the amount you get for a $1,000 in the past wouldnt be the same that you will be getting in the future because the price would have increased by then.
Limited supply doesn't necessarily mean things are precise unless they have acceptance, demand.
Yes, limited supply but no real world usage then such things may attain zero value over the time. But, just think in reverse: limited supply and having at least one reason for more than 50% of world population to adopt. This is what exactly bitcoin is going to do and adoption rate will be boosted by higher prices and higher prices will be attained on every halving

.
We can speculate that demand will increase but the opposite is possible as well.
Everything is possible but when everyone just keep into bitcoin what they afford to lose on unexpected events, I guess that also more than enough for bitcoin to be testing billion dollar levels to be considered it as precious one.