Investment and speculation is different.
If you but an oven to start a bakery that's an investment. You can calculate future cash flows based on the investment.
Speculation is when you but something so you can sell it later at a higher price
I know that these are the standard definitions. I consider "investment" as a special kind of speculation, namely one where creation of value through production is considered. But I will try to explain you why both are "speculative" and why the borderline between investment and speculation is not so evident.
I know that it is strange practice at first sight to redefine words which have a standard meaning. But my aim is to go to a better understanding of the concepts and dynamics behind it, instead of thinking in pre-defined boxes. I do not want to modify the meaning of the words radically, but I want them to represent a core concept, and not an "agreed-upon catalog" which misses, in my opinion, the core idea somewhat.
The core defining property of "speculation" is for me: "betting on future prices of assets". Now, given that prices are the resultant of market forces, which include offer and demand, this means betting on the future capabilities and wishes of OTHERS. To me, the core idea of speculation is the uncertain bet on other people's economic behavior in the future.
That bet is just as well the case when you produce as when you "speculate" (in the standard sense). When you produce, you are betting upon a sales volume and a sales price. Your current "acquisition price" (= the investment in the production) is estimated lower than the cash flow that you will obtain from it. When you "speculate", you do the same: you acquire assets at a current price, with the idea of selling them at a higher price later. In both cases, there has been a kind of value creation: in the first case, it comes from production, in the second case, it comes from appreciation. This value creation (subjective value creation!) is a bet. You are BETTING that the price of the oven, of the flower, of the labor, .... is going to be lower than the price of the sold bread. It might be that tomorrow, nobody is eating bread anymore. Then you have been buying expensive assets (ovens ...) today, to sell something worthless tomorrow. If you are buying expensive bitcoins today, to sell them at a lower price tomorrow, you have been speculating too, but you also lost. Because you've lost the bet.
However, it is true that "speculative" assets have no consumption value, so their only value is as a price. As such, purely "speculative" actions are a zero-sum game (because on the price level, all forms of exchange are zero-sum - it is on the subjective value level that exchange brings value creation), and there is no value beyond the price concept with speculative assets, while production is not zero-sum because there is genuine consumption value produced. This distinguishes the particular category of "investment" from the other (in my definition) kinds of speculation.
What I call speculation is to me what is the core idea behind speculation. I would use the right economic word for it if it existed, but I don't think it does. How do you call, in economy, "an economic acquisition of assets that has as sole purpose to be sold, or to help sell other assets in which one is not directly interested, on the speculation that those assets will be wanted more and can be traded for more than the price to pay now for it " ?
It is what I call "speculation" in the broad sense.
Again: buying an oven to make stuff FOR YOURSELF is not a speculative act. You could call it an investment too, but it is an
indirect way to obtain consumption (namely, eating the bread that you will bake with it). The point is that no matter what happens, you will be able to make your bread with that oven. Even if tomorrow, nobody likes bread anymore. Even if tomorrow all prices change. There is no betting on other people's economic intentions and interactions in the future when you buy an oven for your own bread.
I redefine "speculation" in this way because in my opinion, it captures the essence of the act: namely betting on other people's future economic interactions.
You cannot calculate future cash flows of your bakery. In order to do so, you have to bet on the price of bread tomorrow. Now, that price is pretty stable, so your bet is not a very risky one. But it is a bet nevertheless. The calculated future cash flow of a bakery is IN PRINCIPLE not different from any technical analysis of the future price of bitcoin. Except for the much much lower volatility. You are doing "technical analysis" on a horizontal line essentially with a bakery.