I usually don't give tips how to make a lot of money fast, but this is kinda hilarious and scary at the same time.
I've been using exchange on Crepcoin's webpage for little over a month now and noticed that price fluctiations are bigger than in most exchanges. Yesterday I sold 1299.91 PNKS for XMR and today I did set buy order for 14847.46 PNKS without depositing any extra coins... This gives 1042.2% increase in value overnight. If all goes well, before this week ends, I will gave gained 0.6-6.0 XMR (c. 100-1000 EUR) with just 0.10 EUR worth of PNKS.
Basically I'm selling PNKS at rates 0.0000003-0.0000005 XMR/PNKS and buying back at 0.00000004-0.00000005 XMR/PNKS depending on what rates the other orders have. I always put buy orders at slightly higher rate than previous highest order and sell orders at slightly lower rate than previous lowest rate is.