I'm pretty sure they must have heard about cryptocurrency before it is just that they don't really paid attention and study it that's why they are saying they don't know it.
But it is still a good thing that even though it is just 32% who actually knows cryptocurrency if you're gonna put them to a perspective that's a lot of businessmen that knows and half of them are willing to use it as a payment method which is a really good thing because they are ready to adopt and accept cryptocurrency totally which will lead to more micro-entrepreneurs to accept crypto too.
That's right, we also have to pay attention to its functionality and effectiveness. Most people would consider using fiat more effective and practical as an instant payment, especially for micro needs. I also salute to companies and businesses that open and accept cryptocurrency as an alternative payment, this is a form of financial evolution. Although it has not been maximally used, one day it will definitely be a better change for the convenience of all.