I think bitcoin trading is more obvious for forex than online shopping. I saw the investment opportunities at https://investorjunkie.com/ when I wanted to pay off my mortgage. Before you can deposit, you will need to prove your identity. Although the KYC (know your customer) process may vary depending on the forex broker in question. So your accounts will be checked from and to until they find out the legitimate reason for having bitcoins. Also, it is not always possible to find a pair as the international currency was considered the dollar, now the euro and soon bitcoin... But it is an electronic currency that has no exchange rate or counterpart, it is not a real paper that can have an equivalent in banks or physical type exchange offices.