So there is no advantage over a credit or debit card as long as your bank doesn't charge a transaction fee. I have a cash back card so there is actually a disadvantage.
A cup of coffee will cost a different amout of bitcoin depending on what time you purchase it.
For someone doing a lot of transactions it looks like a hundred bucks or more for the tax service on a yearly basis.
Optionality
As Noah already pointed out, you don't want to spend your Bitcoin as it's your investment and savings for the future when it goes $500K in 5 years and $1M within 10 years
However, if you were fleeing an authoritarian Canadian government with all of your savings, Bitcoin is your escape that allows you to have food, clothing and shelter
The Canadian government would destroy your financies, freeze and seize your accounts and properties
Bitcoin allows you to go anywhere in the world and not go hungry and spend a little bit here and there
Optionality beats being trapped into not having any options
