That depends on what you are trying to do with the WoF,if you want to buy FUN tokens when the price is somewhat down it makes more sense to use them and buy them with the satoshi earned from the spins.If you want to use them all at once which I also think is the best thing to do,most likely you should do so before a good event like on Sundays before the lottery tickets so you can get a lot of them and increase your chances to win (although they remain super minimal no matter what you do) or if you will wait a lot longer and you spin them all before the Lambo draw once every 6 months for example.It all depends on your intention.