Bitcoin's use in day-to-day commerce will generally trail its investment/speculative usage by at least an order of magnitude, until that market is fully saturated, allowing commerce usage time to catch up. At least, it makes sense to me.
It will never "catch up" and that is fine.
Gross World Product*: $71 trillion
Global Annual Forex Volume: $1,423 trillion
Ratio of currency speculation to actual goods/services: ~20:1
Non-speculators trade because they HAVE to. As an example, a compnay receives 100 BTC and needs USD to pay for materials, they aren't trading to make an exchange rate profit, they are trading because they need to. Likewise someone buying an Avalon (is/was? only sold for BTC) who only has USD is trading because they need BTC. If there are no speculators (or low speculative volume) the market is going to have huge spreads and low liquidity. In order for non-speculators to have deep liquid markets generally requires a multiple of speculative volume. This applies to currencies and commodities, Bitcoin will be no different.
In summary, all markets need speculators in order to be efficient and speculation will ALWAYS be a magnitude higher than "real economy".* GWP is the the sum of all the gross national product for all nations. Gross national product excludes imports and exports, since all imports are another countries exports they aren't useful in looking at global production.