Legal tender is taken for granted by us in 1st World countries, there are many many instances of poorer counties seizing legal tender of their citizens leaving them penniless. Cadano for instance is setting up decentralised currency in Africa right now that is backed by the Egyptian government (whos prime minister has University degrees in cryptocurrency FYI), its 100% under the control of the owner of the currency and is peer to peer trading so it cannot be taken away from them by sidious rulers.
Besides that compies like Tesla accept bitcoin for purchases now, venmo owned by PayPal allow people to pay using crypo and even buy it from the app. BMW have signed a contract with VeChain to for their block chain to help with world wide logistics. Block chain international transactions clear in 15mins as opposed to 4 or 5 days. International companies will use this technology as a means to progress
There are lots of examples of companies waking up to crpto.
Legal tender right now is on its last legs, look at the world wide debt we are currently in and it will get worse. Decentralised currently will protect people against hyper inflation if there is a collapse of an economy.
I would say we are 5 - 10yrs away from a shift in the way everyone manages their finances and currency.
Don't get me wrong there are plenty of shitcoin ponzi scemes, dodgecoin, safe moon and the like just offer a meme and have social media pull. They don't offer any innovation and exist to scam money out of retail investors when the majority stake holder dumps and runs.