Does free trade mean the trade must have no cost?

Does free speech mean the speech must have no cost?

It means you are free to engage in these activities not that it will have no cost to do so.

Bitcoin could be seen by many as the ultimate expression of free speech as anyone is able to broadcast a transaction without permission and even include a message in that transaction but I suppose that you would also not view this as free speech as there is a transaction fee involved.

Perhaps we will have to agree to disagree here.