You're there, Bitcoin was initially created as medium of exchange. But as time goes on, it turns out to be medium of investment. I prefer it for both investment and for the exchange level. Cos its the only means i can withdraw funds online in my locality.Your assertion is correct, although Bitcoin was originally created as a medium of exchange, it is now more and more used for investing and trading (like stocks), although Bitcoin's voting has started to decline compared to several years ago. I personally prefer to store Bitcoin as an investment and trade rather than using Bitcoin as a medium of exchange.