Is it safe to share id informations to the exchange sites, is someone can do with these? I'm feeling like someone will use my id informations for the crimes at any moment. Can someone help me about this thought, i even can't sleep in peace now.
Well, they are registered with FINCEN and are thus a money transmitter, so they need to comply with AML/KYC regulations.
They laid out their policy a few years ago, so it's nothing new. They've been around for years and they're a legitimate exchange (as far as those who operate without state MSB licenses go, anyway).
But in general, I minimize the identity documents and personal information I give to altcoin exchanges. They generally say nothing about complying with data protection laws, and historically, database leaks are rampant. I had my ID and other information leaked from MT Gox several years ago. I don't intend for it to happen again. So these days, I stick to Changelly and Shapeshift, decentralized exchanges, or Bitmex for trading high cap altcoins with leverage.