But if we can't trade them, how are we gonna name its price tag? Why would anyone trade something which doesn't have any value?
you can trade them but only with other individuals. think of it as a possible future bonus and maybe forget about them for now. you might get a nice surprise in the future. i don't know where the price is coming from on byteball.co, maybe here -
https://byteball.slack.com/?redir=%2Fmessages%2FC3KFYK5H7