If bitcoin became a legal tender then Monero would have that bridge though, so I'm routing for it, but it doesn't effect crypto all that much either way.
So many of these "cryptocurrencies" everyone and they're dog loves are just scams. If they get legal support then governments will just have a new set of rich incompetents to bail out...
Not that they can't afford it.
Total US money supply ~21 Trillion
Total monopoly money supply (the boardgame) 20,580 x 250,000,000 = 5.145 Trillion
They have some to spare.
Real crypto will always be underground. That's where it's ment to be.