WordPress is a much broader tool for developing not only target sites themselves, but also auxiliary plug-ins. Although this content management system is quite losing development on Laravel. But as a basic level is more than enough.
Very vague wording of the question. If we put it, we must provide a list of compared. Or the list of criteria by which it is necessary to evaluate. Personally, I even have a judgment about the best hosting change once a year at least
The possibilities are many different, you need to look at the size of transactions. Depends on the specific cryptocurrency. Sometimes you can toggle directly through the exchange, sometimes it's better to use specialized exchangers.