^ Sad to say, BTC did not meet its goal as an alternative payment system based on the Whitepaper that wrote by the BTC creator.
People much prefer to use BTC as an asset not as a mode of the payment system, because BTC is really hard to accumulate, every single sats are very important because of its value that time to time it will become expensive. I have BTC but I hoarded this because I know the value will keep increasing and waiting for the next ATH. However, you can buy anything using BTC if you wanted to spend it as a currency, it also depends on your country's jurisdiction.