Using BTC gives you the financial freedom to transact globally,BTC provides economic stability and Newfound freedoms to the world making it true game-chaging technology.
Bitcoin can only be a game-changer if you use it based on its purpose. If you use bitcoin because it brings freedom of choice, then it actually serves its purpose, but financial freedom is probably out of the context. You can only achieve financial freedom if you maximize the usage and benefits of bitcoin, but not leaving fiat since it will always remain the official currency no matter what.
At least we have a choice now, and for sure majority of us haven't heard the word "investment" prior to joining Bitcoin market. Now, everyone is talking about how good "investment" it is as it gives us financial freedom, meaning we make a profit and from that we can start to buy things that before we don't even think that is possible because we don't have the money.
But through Bitcoin, we learn how to save or accumulate it and then wait for the right time to sell and make a lot of profits, rinse and repeat. I do agree that fiat will still be there no matter what, but at least with Bitcoin, we have learn a lot from financial perspectives and we are making some decent profits from it thru holding and investing on it for the long term.