The most important advantage in moving into crypto and away from fiat is in the ability to ditch elite manipulation through a Keynesian economic model into an Austrian economic model that doesn't constantly devalue the currency. We've been subject to massive theft on a scale that most just don't understand.
Since the time I was born, my dad has held savings in the bank but even with interest, that dollar he put in the bank in 1961 is only worth $0.04 cents now. Decentralization is a bonus in that no one person will have as much control as before.
In this talk, Stefan Molyneux talks about the properties of bitcoin. Notice that he doesn't emphasize decentralization as to the reason why it benefits us...