Maybe we are wrong to think that Satoshi never had the thought that bitcoin was going to become very volatile and people were going to be able to make money from how the price of bitcoins changes easily. Satoshi is someone that has insight and was able to make this system that has been able to survive and is doing well after a long time of creation, do you think that it never occurred to him that people may start investing in bitcoins instead of really using it for buying and selling?
For sure he knows that as well,
"When someone tries to buy all the worlds supply of a scarce asset, the more they buy the higher the price goes. At some point, it gets too expensive for them to buy any more."
- Satoshi
So in a hindsight he foresee that at some point, it will be traded, i.e. buy and sell, supply and demand and that it will be expensive, as just what we have seen in the last 2 halvings, and in this incoming 2024/25 bullrun, we might see for the first time the price hitting 6 digits.