Some of those transactions are belong to big companies. Believe it or not, not everybody on the internet are average Joe's like you (or maybe me) There are also many rich people who adapted bitcoin in early phase. There are also many drug dealers/shady business owners and money launderers who use bitcoin.
I believe that there would always be millions of transactions weekly with bitcoins especially in those exchange websites. And they are not just single individuals but big groups that are considered as whales in the economy of bitcoin. Many of them also are occurs in the deep web and other type of dark marketplaces.
Yes I am agree. It already more than one million of $ transaction in bitcoin. The transaction is for good,altcoin and event drug. But I do not like if bitcoin is used for drug. I'd like to use bitcoin to buy good thing although I have to convert it into fiat first.