I didn't want to bother logging in to comment, so I will do it here.
The author makes the same mistake that so many others make: the belief that the halving decreases the supply of bitcoins. Then he makes the mistake of comparing bitcoins to consumable commodities like oil and wheat.
First, the supply (as in money supply) of bitcoins is increasing. After the halving, the supply of bitcoins will continue to increase. The supply of bitcoins does not decrease.
Second, unlike oil and wheat, the supply of "new" bitcoins is not important because, unlike oil and wheat, bitcoins are not consumed. All bitcoins are available as supply, not just the new ones.
Here is what actually happens:
The increasing money supply of bitcoins creates a constantly increasing market supply of bitcoins. More precisely, the supply curve to shifts to the right as the money supply increases. After the halving, the supply curve will continue to shift to the right, albeit at a slower rate. Shifting the supply curve to the right causes the equilibrium price to fall (assuming that the demand curve is constant).
In order to maintain a constant price in the face of increasing supply, the demand must rise (or more precisely, the demand curve must shift to the right) at the same rate as the supply curve. Otherwise, the price will rise if demand increases more quickly than supply, and the price will fall if demand increases more slowly than supply.
Next, we see the price go up and down despite the constant increase in supply. That means that the demand is constantly changing. We know that the demand does not rise at a constant rate, so it is naive to assume that a slower increase in supply will cause a rise (dramatic or not) in price because it assumes that the demand continues to rise at a constant rate.
Finally, it is really much more complicated than that. Not only do the supply and demand curves shift, but their slopes change due to things like propensity to save, the velocity of money, and other significant factors, including the price itself. The whole system is very complicated, chaotic, and difficult to predict. It is ridiculous to assume that the halving will cause a dramatic rise in price. It is much more reasonable to assume that the halving will put less downward pressure on the price.
This was the most properly informed post I have seen all day, thank you for clarifying this for my knowledge as well as many others. Had a few questions get answered just by reading your post, and I agree with the tl;dr
halving will put less downward pressure on the price