Its simple to say that the taxation is too much, but, ideas differs, imagine the kiosk owner to be a cryptocurrency trader. It doesn't stop him from trading while doing a real life business. For instance, I open a shop in my street or somewhere, I'll definitely accept bitcoin because its useful to my side business, trading cryptocurrency, many traders are going into real life businesses and it'll help disseminate the use of bitcoin. In the world of economy today, a little business added to your online business can make a huge difference to your earnings, and when that happens you are likely to accept bitcoin. In a nutshell, I think those who accept bitcoin know what to do with bitcoin regardless of the volatility.
This looks good if your country does not prohibit accepting Bitcoin payments, that is, making financial transactions. What if you are breaking the law? What will be the punishment in this case? I say this because in my country it takes a very long time to decide the laws on the adoption or prohibition of cryptocurrencies. The government moves from plus to minus and vice versa. And as long as bitcoin is an unregulated coin, we will have to wait a very long time for things like accepting payment or buying with bitcoin.