No. 3 should be the best scenario, using physical bank as purchasing is done direct on ramp, via Debit or VCC..A few banks Have High limit card catering to online purchases
NO. 2 possibilities of obtaining Good prices via P2P is highly dependent on the EMI used, The specific currency Traded via P2P, Physical Banking acct attached to EMI..
Negate one time high amounts, Funds should flow into EMI From bank attached in Portions and overtime you build up the total transaction, one time high limit TRX=Risking of Funds.cig-:,