The cryptocurrency industry is very new and people and organizations are regularly developing new technology within it. We generally recommend that users treat most, if not all, of their experiences here as holding some risk and employ their discretion when navigating these new products and tools.
The OpenBazaar wallet is a hot wallet, meaning when you are running OpenBazaar you are connected to the internet and your keys aren't as safe as if they were stored somewhere not connected to the internet. OpenBazaar is also a complex peer-to-peer application that is open-source, which means that developers from all around the world are collaborating to build it. It is still maturing and it's possible there may be bugs which could result in a loss of funds. For these reasons we recommend that you use the OB wallet as a method for transferring funds to enable commerce, but not to store funds long term.