A BIG WARNING here! STAY AWAY from Binance Free Accounts! At some points, they will freeze your assets and force you to provide KYC. THis happened to me! This Exchange is not serious at all!
based on my chat with Binance support, frozen account or assets happen because you account got security issue or something else made your account detected unusual. This case can be a good information for all of binance user, especially who don't want to passed KYC. Thank you for sharing, i hope you can get your money back.
If you have no issue in doing the KYC then you should do the KYC on binance and do not operate it as a free account. In some point, if you account is hacked or there is some problem, KYC might help to resolve the issue as you can prove yourself as original owner of the account.