Certainly in the USA that is not the case--Bitcoin and other cryptos are perfectly legal here.
Perfectly?
you might want to check the legislation terms .. its not so perfect
i preferred the era before legislation, back when bitcoin was termed 'not illegal' (separate status different to 'legal' ratified by legislation)
There are no
meaningful restrictions on the use of Bitcoin in the USA. Anybody can buy, hold and sell Bitcoin, cryptos, and non-blockchain digital currencies. This is demonstrated by the fact that billions of dollars worth of Bitcoin is traded every single day in the USA, and there are millions of holders of Bitcoin investments which are ultimately backed by companies that trade directly in Bitcoin.
When you can go on the Internet and buy Bitcoin in five minutes with your credit card and the US government will not arrest or otherwise penalize you for doing so, this is what I call "perfectly legal". Maybe your definition of that is different, but that's how I use the term.