In that case (asking $1000 in crypto), you can scratch the last line in my previous comment... Asking money to allow you to withdraw your own money are clear signs of a scam.

When i made my first reply, i did not know the sum... I had seen some company's asking for a $1 creditcard deposit when you start a "free" trial, so you can go and look in your creditcard statement and tell the company some specific information that can only be known to somebody having access to the creditcard statement, thus proving you own the credit card you want to use with them. These amounts are always very small (usually between 50 cents and $2), it's only usefull for verifying creditcard ownerships, and still you should only do this for *very* trusted company's.

There is no good reason to ask somebody for a crypto deposit to verify anything.