I've bought and sold a few times now and quintupled my holdings to 75 XPY.
I could never understand this logic. You made money trading a coin. You could have made even more if you hadn't bothered with Hashlets and Hashstakers and just bought some cheap coins in January and started trading. Doesn't even need to be XPY, trade any coin if you are so successful at that. But you do realize where the trading profits came from, right?