The "Vault - Lock/Unlock Chips Feature" wasnt just implemented for fun but for future use when you/we will be able to trade chips. Right now, there is indeed no point in doing so but I thought I would share with you that it`s not just a fun gimmick. 
Unlocking coins in the vault normally comes with a little delay before you will be able to claim your chips and sell them - this is to prevent too many people unlocking due to market fluctiuations.
Long story short: Chips will become tradeable sooner or later and that`s why this feature will be needed.
Do you know what the future use case could be? I mean it is a fun little feature there and I get it that they want to do something a little fun for everyone and I like that, but if there is a future feature that we do not know about, I love to hear about it. The time period is not a problem at all, it is something expected and I wouldn't be shocked if every other place was the same as well.Unlocking coins in the vault normally comes with a little delay before you will be able to claim your chips and sell them - this is to prevent too many people unlocking due to market fluctiuations.
Long story short: Chips will become tradeable sooner or later and that`s why this feature will be needed.
I mean there are too many panic sellers out there, too many people who care about the price movements of their coin that are too blind to realize they are actually not profiting in fiat when they wait here, they are profiting in crypto and in the long run that is better. However I also get some people, like I read somewhere that dogecoin investments on casinos dropped as much as 60%+ total, that is understandable, if I had doge, I would have sold it long time ago as well.