one thing about cryptocurrency users is that they all first find out about bitcoin then they find out about alternative cryptocurrencies or altcoins. this means they all have a bitcoin wallet and some amount of bitcoin in it then they may or may not have some altcoins too. it is never the other way around so saying "most" here is choosing the wrong world. it should be "all".
Most of them ? All of them ? No! Not anymore.
lately Bitcoin to expensive for common people. so far, I can't know people who have bitcoin. only people who has big fund have bitcoin. People around me don't even have bitcoin wallet. Trade, investment and bounty campaigns are now familiar to altcoins.