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?
Just as you have read so far; kyc documents movement Cannot Ben described or explained
Most times it is sold off in the black markets. I strongly believe the sale will depend on your nationalitys