If the contract doesn't specify specific payment methods then then legal tender laws means the landlord must accept cash as payment. (law.stackexchange.com)
Instead of a Fed reform, we need Fed competition: eliminate legal tender laws, remove the burdensome taxes placed on gold, Bitcoin and other potential currencies, and give Americans a true alternative to Federal Reserve notes for those who want it. (businessinsider.com)
Government interest not just legal tender laws and trying to tax capital gains. (alephblog.com)