Investment is a name suitable for Bitcoin, in fact, it is a currency as it was meant to be.
No currency is as volatile as bitcoin, if it becomes stable, I will agree with you. Until now, Bitcoin has been nothing more than a speculative tool, a tool to create a market that is manipulated, with high volatility, to attract all gamblers to join with the dream of getting rich quickly. Bitcoin is going completely in the wrong direction from what Satoshi created it.