If you are in the beta server and drop 500 world locks and log back in to the real server, your stuff will be saved. A lot of Growtopians use this to troll noobs and I think it's pretty funny. You can also use to experiment. Like if you have 20,000 gems you can buy other packs and test out the items you recieved from buying the pack. The beta server is fun and you should try it when you get the chance.