I just bought some Monetha at https://etherdelta.com/#MTH-ETH, the only exchange trading it right now for about 0.24 USD at time of writing. The exchange appears sketchy to me but seems to work ok if you have the patience. MTH hit the exchange around 0.22 USD about a week ago. I wish they'd develop a wallet sooner than 2019 though as I hate to leave anything on an exchange, especially this one. Should pop nicely once some mainstream exchanges pick it up, is my thinking anyway. Just FYI if you want some Monetha (MTH).