In an age of rapidly developing technology, everyone has a smartphone connected to the internet, so it's no surprise that they know about bitcoin. The important issue is do they know what bitcoin is? Do they know that bitcoin is a means of payment, an asset that can be used as a hedge against inflation, or do they just know that bitcoin is a get-rich-quick tool...? Similarly, in my area, even older people know about bitcoin, but in their eyes, it is just a get-rich-quick tool or related to ponzi projects. I think the fact that people know about bitcoin is not enough to say that it has become popular and mass recognized. Everyone must have a proper understanding of it, then we can be proud that bitcoin has spread and become popular.