Initially Bitcoin was created by Satoshi Nakamoto the main purpose as a digital currency or as an alternative exchange tool that is associated with the internet or common language that we Know that is a decentralized peer-to-peer, of course this creates ease for users in sending money without a third party is the main point.

Because Satoshi has created limits of only 21 pieces of bitcoin and there is another reduction at the same time made as an investment and hedging asset, that's where the price of bitcoin is very expensive, of course if you say, of course you can It happens if the supply is unlimited, but that is the story "if" but the world was sure 21 pieces, it could not be changed anymore, unless Satoshi rose and remodel it again, but whether it might happen, I don't think it would.