I dont know as a trader, but as a holder Monero for sure pays off. Monero is only fungible crypto currency. And currency has to be fungible if what to succeed. Why price of Monero will go up in 2019 and latter is because Monero emission keeps decreasing. IT is not like in Bitcoin halving every 4 years, but it decreases daily and in 2019 emission rate will get relay small.