Given that the majority of us believe that Bitcoin will increase in value over time, would u want to spend it rather than hodl and let it appreciate.
Example: Let's say I purchased a car for 1 bitcoin today but next week the value of Bitcoin has doubled meaning I was probably better off using fiat.
If bitcoin will become a legal tender in my country then there is no need for me to keep this holding because this can be my monthly payroll at work meaning i will have more resources of the coin and i dream of the chance that bitcoin will become our currency so yes , I will spend my Bitcoin and will hold Altcoin instead.