Nation-state governments back the value of their money with violence and deception. Bitcoin's value is backed in reason, truth, mathematics.
True.
By taking away the power of money from governments and giving it to Bitcoin (or any sovereign crypto), you are quite literally making the world a less violent, more reasonable place.
True regarding violence from governments. But people will still use violence in competing against each other - for example to obtain wealth (= Bitcoin).
Bitcoin going mainstream will harm all those who do not adapt to changing rules by holding on to fiat. But that is something I would call "general risk of life, because similar risks exist in many realms of life. During the course of your life you have to adapt to changing conditions multiple times. In the longterm however there is no harm, because all transactions happen in bitcoin and all people will use it.