Of course ordinary citizens can use bitcoins. But, the catch is that, they will not be able to use it properly unless they have atleast some knowledge about cryptography and security. A lot of terms used in the community will leave them confused. But, the thing is that anyone can learn something if it is an interest or a necessity. Just look at computers 
I agree with you! I think all of us can access and used bitcoin because in my opinion, it is a forum for everyone but the main issue here is that people without the enough knowledge about technology and cryptocurrency like bitcoin cannot navigate it so well especially to those who don't have an interest in here. Still I can say that ordinary people are welcome here.