It's  so funny  that at this stage and century , some people still believe that Bitcoin  is a scam after it has proven itself  over and over  which has led to it's massive adoption.

If anyone still thinks Bitcoin  is a scam and depending only on fiat currencies then he or she is a slave to fiat system and believe  it or not Fiat is brain rot.
There are so many things these peoples  must understand  to know why they are really  a slave to the fiat system.

Decentralized  nature
This is the major difference between  fiat and the bitcoin,  there's  no influence or control from authority  like government , no manipulation in transactions  or values everything done in bitcoin is transparency  as full  nodes could be run by anyone,anywhere anytime without hidderance  and this a way for showing every transaction on blockchain making double-spend bitcoins impossible.

In fiat everyone is subjected to the power of governmentand its agencies,  the supply ,circulation are always influenced by their Monetary  policies.

Supply
Bitcoin  has a specific fixed supply of 21M coin which will ensure protection against  every  from of devaluation , beside there's  a smaller  unit that can be used in btc(sats) incase of any form of scarcity and scarcity brings  about increase in price , bitcoin price is also determined by the demand and supply in the market.

On the other hand, fiat currencies can be printed at will by the government  and the supply will still be determined  by that single entity  which is still the government.