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.

There Are a few things that I have used Bitcoin to pay for but they are more valuable than buying Bananas, if what you are buying is valuable, and fits the transaction fee, also if the seller accepts Bitcoin as payment then no issue, I have bought...

Gaming consoles, digital cameras, shop for games online, pay for electricity and data bills, desktop PCs, laptops etc and that's because few stores online accepts Bitcoin and few other coins as means of payment.

None of these was bought in a offline store, no store in my area or city accepts Bitcoin as a means of payment.