Remember that the most people at bitcoin are normal people with normal jobs, they cant support bitcoin above big ammounts, only whales and miners would be able to push the price soo high, but why would they do such if no one will be able to buy anymore bitcoin. I do believe bitcoin can reach 2000 dollars at 2030 or before, but this due to the halving and some projects like megaupload be live and became a huge sucess, augur and zec projects live as well, this should make the numbers of bitcoiners to explode and raise maybe 20-40% population.
The price will get pumped this high not necessarily by just a couple of whales. I believe that the price would hit this range if the "normal people with normal jobs" starts buying bitcoins instead. They might not support bitcoin to become that big individually, but if they do it altogether, they might achieve it.
It's not needed that people buy 1 bitcoin or two. They can always buy in small pieces like milliBit or microBit so even the price is high, it's okay.
I don't think at 2030, the price would just be $2000. We're already around $900-$1100. It wouldn't take that long to get to $2000 range.