Perhaps safety and security are always the main parameters that users are interested in when they choose to exchange, but never just this one factor, after we have a safe home, what we need to care about is probably the issue of cost and income. Costs should be reasonable and exchange needs to create conditions for us to earn income, they need to have a high volume of users and high trading volume, safety only allows them to feel that they can stay and live, but it lacks the long-term conditions, so need favorable circumstances to make money