Binance.com stopping to give services to people from US does NOT mean US banned crypto! how do you even come up with that kind of conclusion?!
the only thing that it shows is that Binance.com does not want to or can not comply with US anti money laundering laws, it is possible that they are laundering money specially with all their tokens that they keep creating out of thin air without them being backed by anything (exactly what Bitfinex does with Tether).
it is also because they are creating a new platform for US citizens only
https://www.coindesk.com/binance-says-its-launching-a-us-exchange-with-fincen-registered-partnerWe have the right to financial freedom and congress must hear us.
you gain financial freedom when you use a decentralized currency (ie. bitcoin) not a centralized website/service called Binance.
In fairness, the OP has brought up a good point regarding the antiquated laws of the U.S. in relation to crypto. The U.S. has several agencies that are in conflict over the definition and treatment of cryptocurrencies, and they are simultaneously trying to exert pressure into the space. This has the effect of inconveniencing investors as companies must stop servicing Americans. Unclear regulations also prevent new companies from raising the capital they need to compete.
Fortunately, Binance will offer a website specifically for Americans, but it seems unclear when this will be available. There isn't a ban on crypto, but the lack of regulatory clarity is stifling competition.
US had categorize a lot of popular coin as securities that won't be able to traded freely as other cryptocurrencies inside the US. So, though they get an exchange, it would be limited to few options which too can come into shadow of SEC and define them something else or just illegal.