It's safe.
You can specify the order of the nodes by inspecting the parent node. The order is shown in the parent node's "Links To:" section.
When the parent node evaluates its links, it will make a list of all nodes whose Conditions are true or blank, in the order specified by the "Links To:" section. If any of these are assigned to an NPC actor, it will use the first node in the list.
If the "GetPartyCoins() >= 100" is false, then that node will not be in the list, so the conversation will use the next node in the list.
There is one exception: If your links have different
priority values (e.g., AboveNormal, BelowNormal, etc.), then it will first check only the links at the highest priority level. If any of those links are true, it will stop there. Otherwise it will check the next priority level, etc.
Side note: It looks like you may have a broken folder in your project. The folder '
Editor Default Resources' is a
special Unity folder. It must be in the root Assets folder. It should not be moved or renamed. The same is true for the Gizmos folder.