Coininvest is a company specializing in precious metal trading, selling metal coins and metal blocks, but I haven't seen any information about regulatory licenses. Is this company reliable?

They changed their price of gold coin and gold bars arbitrarily, and I don’t think it is a trustworthy broker. Anyway, I don’t have a pleasant experience here…

詢問提現的稅收機制，結果私自開啟稅收機制，強制消費者繳稅，否則無法出金甚至凍結帳戶。