Hard facts about speculation/real world transactions are hard to come buy, but someone tried in 2012 (http://codinginmysleep.com/measuring-bitcoin-speculation/

Hard facts about speculation/real world transactions are hard to come buy, but someone tried in 2012 (http://codinginmysleep.com/measuring-bitcoin-speculation/ http://codinginmysleep.com/measuring-bitcoin-speculation/) and the blockchain-info guys made an upto-date chart: https://blockchain.info/charts/tx-trade-ratio https://blockchain.info/charts/tx-trade-ratio