Hey Aternos team, it's me again haha.
So, the thing is I have another plugin I'd like to recommend.
In this case, it goes by the name of
BottledExp
I know, I know, the last request of this plugin was outdated. However, someone has taken up the request to completely recode the plugin, and is currently on the SpigotMC forums. The last update was around mid-2017.
Here's the link to the official resources page (not forums):
https://www.spigotmc.org/resources/bottledexp.2815/
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So, this plugin is actually another conveniency item in which it enables players to "bottle" up their experience. Using a few commands, they're able to store certain amounts of experience into bottles. There's also multiple commands which allow you to interact with currency and experience, and other configuration options.
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Thank you again, Aternos Team for going through my paragraphs. And hopefully, this might also be added into your collection. 
