bump. updated terms. remove requirement for exchange of trust. up amount to 10 USD. apologize to those who were offended
There is still no reason for you to want to do this. There is no reason that you would want this other then to either scam or buy trust.
This is also essentially a interest free loan for you. If the price of bitcoin falls then you can initiate a chargeback and recover your $10, however if the price of bitcoin rises then you profit.
Or you could hope that whoever you "buy" from would not want to wait 6 months to send you their bitcoin so they send before the time you can initiate a chageback expires.
Every scenario works out to you pulling a scam.