Many people see Bitcoin as an investment and nothing more. They give Bitcoin a business approach and will always project profit which will lead to speculations about the future price of Bitcoin. Just like OP rightly pointed out, Bitcoin price cannot be capped because it has the potential of getting to any price in the future. A few years ago, most price predictions were $100k, and Bitcoin has broken that barrier. So we might start seeing another prediction and I am sure that Bitcoin will still exceed it.
Its price is actually capped? To me it's not, since every season or section has a speculated price that they expect Bitcoin to reach and break; it's all about seasonal expectation and nothing more than that. The more Bitcoin reaches new heights, the more likely the speculated amount will also increase; that's how it has just been projected. There has never been a price limit for Bitcoin that anyone said it can't pass; as long as the ecosystem is alive and humanity still values it, the price is unlimited.