It's also going to be much harder once the currency has any sort of significant financial value. This kind of manipulation is only easily possible at the early stages.
I continuously trade DOGE into BTC. Since starting a little over 4 weeks ago, I've made a significant amount of BTC via DOGE. I'm about 1/2 way through paying off my rigs, give or take. I also missed out by not holding DOGE before the massive run up, but I'm cool with that.