you got something wrong! not "everyone" thinks that. and that is why bitcoin is strong. and it is not just something you invest in and make profit. it is a unique decentralized payment system that can not be controlled, censored, restricted, or anything like that. and all of these attributes are making it strong. these are the reasons why more people are going to buy (aka dump their centralized fiat for decentralized bitcoin) bitcoin and why its price will go up. not because there is more profit on their centralized fiat.
i stand with you it is not about profit or removing fiat system. Bitcoin created a way so we can do business without trust via smart contract( i know Ether initiated it but it was a idea from bitcoin ) its a big step towards globalization as before bitcoin we have to deal with lot of fiat if i am doing business in multiple countries but now we can do it by a single currency without any bank support and as well it didn't take time, someone who have a big business always wants this (Starbucks looking forward to accept BTC).
BTC shown this world about our technology how far we have come, fiat system needs modification like postal service, farming, real estate, mobiles, computers everything.
and YES! it has a bright future. iNDEED!