Day in day out there are new projects requiring kyc from investors
Exchanges requiring kyc, for some in order to maximize your ability to withraw large sums of cryptocurrencies and some even before you can trade on the exchange
The bigger question is how safe are our kyc documents?
Generally, it is not safe and it will never be safe, especially in the ICO's, they are unregulated, you do not even know who are the people behind those faces, they are not compliant to any government and so they can sell your vital information in the market, without you knowing anything about it.