What if something goes terribly wrong read desc DataStores?

So I know its rare but you know how theres a 6 second cool down on SaveAsync I was wondering what if a person bought something like lets say cash using robux and imagine if I had an auto saving system and I auto saved right before he left so the SaveAsync on the 6 second cool down didnt work and therefore he left without having his money saved what could I do to prevent this and has this ever happened?

use pcall and other stuff also look at this article it will explain it and it tells you how to know if something went terribly wrong, also article https://developer.roblox.com/en-us/articles/Saving-Player-Data