What's mass adoption to you? Addresses? I've used maybe 1000 addresses, most likely more. I use 1 a day, probably more. Count altcoins and I use maybe many thousands.
Exchanges? Every deposit new address.
And is 100000 people trading mass adoption when no one has private keys?
If I read this thread, it seems that what is meant by mass adoption is the increasing number of Bitcoin users or the increasing number of people coming to invest in Bitcoin. It seems like everyone has a different understanding of this term, but that's not a significant problem. but whatever it is, I'm happy if more and more people come to invest because the limited total supply causes bitcoin to become increasingly scarce and the price to increase.