That's also true. In that way the sayings are kind of opposite of each other so they'll always win.. :) Anyways, kudo's to you for daring to take the risk. I would recommend you to buy in multiple increments. For example, if you wanted to buy an additional $1000 worth of Bitcoin, I'd split it over 2 or 4 transactions. Wait for a while (let's say 24 hours) before doing another transaction. If the market absolutely tanks, you'll also buy for lower prices. If it goes stabilizes or goes up, you'll still be able to buy relatively cheap.