So he wants to exchange all his worthless VEF into bitcoins, knowing there is no market for Venezuelan currency and the government imposed strict currency exchange controls so you can’t export that money. Exporting it is useless. Nobody outside Venezuela accepts VEF. He is also counting on the gullible and naive here to not do their due diligence and simply be blinded by those endless stacks of worthless Venezuelan Bolivar money.
Here is one video which shows why you should NEVER take up this offer:
https://youtu.be/fnLM2fXeXY4To help you understand why and how this is a scam, for 1K bitcoins he will need to give you VEF which could fill an entire football stadium. Or maybe even 2 or 3. And that would be worthless bits of paper you can’t take out of Venezuela.