we should use the leading exchanges in this market, such as Binance, Huobi, Okex, Kucoin ... these are the best exchanges and hard to become scam like the small exchange
I wouldn't really consider Huobi and OKEx to be the best exchanges.
In the more recent times quite a bunch of the PlusToken scam coins have been dumped on Huobi and a chunk on OKEx, and that not once, but multiple times. How come these exchanges don't freeze their funds? They probably are making a killing allowing these scammers to dump on their exchange stealing liquidity from the ecosystem.
Both exchanges have KYC policies in place, so they know exactly who does what with these coins. I wouldn't recommend anyone to use these exchanges. Steer clear of them!