At the moment it is impossible to speak about the existence of the most secure cryptocurrency exchange of any kind. The problem is in the technologies novelty. Purchase of bitcoins through the exchange platform remains the difficult process.
The statistics says that 20% of bitcoins don't participate in turnover. There are concerns that their owners lost access to their wallets. The problem is not only that they didn't write down the password it is much deeper.
The modern cryptocurrency exchange aims to provide the convenient interface, but doesn’t always achieve success. The open code of the majority of new coins requires encryption of each action. As a result, the end user is forced to master programming basics. Of course, he can apply the accompanying shell programs. But remember how many problems there were in its time with the Windows operating system, and how few intruders could pick up the keys to the initial Linux.
The same is the situation with cryptocurrency exchange api through the exchange. The better the buyer understands a program code, modern technologies, the safety of the capital is higher. To optimize the process, investors use traditional exchange platforms or support of consultants. It partially solves the problem of the safety of finances while long-term storage.