At least in the US, phone prices used to be subsidized by the carrier, who passed on the cost as higher monthly prices. The industry almost completely moved away from that now. Verizon, for example, was never buying iPhones from Apple for $200.

As far as I'm concerned bitcoin should become valuable as a protocol (i.e http or html protocol) with no direct monetization. I think comparing it with mobile phones is an apple vs oranges situation

Early on, people are unconvinced by a nascent innovation, so are willing to pay less. As the network effect grows and the innovation becomes indispensable, they are willing to pay more.