Bitcoin to buy bananas from a hawker? What do you expect the hawker to use the Bitcoin for? And how much are you paying for the bananas? In my city I can buy a bunch of bananas for 0.45$ and imagine I want to pay using Bitcoin, lets pretend that the hawker can accord Bitcoin as payment solution, which means I will use like 0.50$ to send Bitcoin to the hawker's Bitcoin address, it makes no sense.
Voila! You are right! Bitcoin is not capable of handling micro transactions and it is expensive to spend. Which makes Bitcoin a very bad currency system. It's more of an asset class than a currency system. It can not compete with the current payment solutions we have in the market. Bitcoin can not compete to become a currency system. It's an investment asset.
Some bitcoin puritans will still argue. But that won't change the truth!