And here's what we will do since you have 67000 BTC, I think you will not be difficult to send 3CoLdQi3TSj1CDAJgCkbBZTrcw9ycmZDzG to this address as a check, say 10 BTC, this will be a direct proof that you really have them. And if everything goes well, that is, to this address 3CoLdQi3TSj1CDAJgCkbBZTrcw9ycmZDzG will come say 10 BTC, then you can make a deal with you.