But I don't think Kucoin will be the # 1 choice if Binance is banned in the US. Maybe OKEx or Houbi would be more realistic.
OKEx doesn't allow US customers. Even to be able to withdraw $1,000 per day you would need to use VPN and provide a fake name/passport number. US traders are better off staying on Binance and using VPN. Only email address is required for much higher withdrawal limits.
Houbi banned US customers on its international site. They have a US-facing site but it's only got ~ a dozen coins listed.
So if you want to be "legit" then Kucoin is the best option. If you're willing to VPN from the US and risk the consequences, Binance is still the best.
there are still a lot of exchangers that can be look upon aside from the names mentioned above..
i am a Non-US BitMEX trader here.
A few leverage trading sites that I know are not actively banning US IPs RIGHT NOW & SO FAR requires no KYC:
BaseFEX
Quedex
KuMEX
The issue with Binance isn't US authority requiring KYC. It is some more complicated legislation which essentially requires all American leverage traders to only trade on US-based, regulated, taxable exchanges. But they dont have eyes on every exchange out there.