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I think that Bitcoin is quite difficult to be used as a means of payment because the transaction fees are too high so that it will be detrimental to its users. In general, people use bitcoin as trading and investment in order to get huge profits. The bitcoin transaction fee should have been reduced so that I can use bitcoin as a means of payment in various online shops that accept bitcoin payments.
This is what makes Bitcoin decentralized. To be honest, the way how Bitcoin is being a decentralized digital currency is already a big thing for me, besides that if we have an issue on transaction fees or confirmation, there is already a solution for it, which is the lightning network.
There are also some people who are into Bitcoin because of investment, not on day-to-day use.