Hmmm. Not sure where you saw this ...
"I saw news that some states in the US have started using cryptocurrencies as legal tender.
I assumed that happened in your area too!"
... but not so in my area. That said, it is not illegal to invest in cryptocurrencies.
https://bitflyer.com/en-us/states
Dear steve!
I understood that Bitcoin can be used as legal tender in the United States!
Your answer made me feel like I probably made a mistake in my English reading!!😅
No, legal tender here is the "almighty" U. S. dollar - reserve currency of planet Earth.
Will that change to some crypto, like BTC, someday? Well, together we'll find out!
https://bitflyer.com/en-us/states
steve!
So what does that site do?
Why are there banks in the US that exchange bitcoins for dollars?