In fact, just look for a few exchanges in the head. Small crypto exchanges are not safe at all. If you must invest in a small exchange, you can observe which currencies are listed on it, the depth of the transaction, whether it is all robots, and so on.
Choose some top-ranked cryptocurrency exchanges that have more users and often work with local governments on blockchain projects. Or if the license is obtained in various countries, this kind of exchange has a lower risk of escaping with money and will be more credible.