Yes it is, when theres money involve in such a thing, it is considered as investment. Like when you buy a house and lot, meaning you are investing your money on it, this is just like in crypto currency, when you buy coins it can called an investment. Which you can sell when the value is arise.
It more likely becomes a speculative investment, where there are risk and probability to make profits depending on the market.
But it was originally known as a method of payments and treat to be a digital cash.