Why even bother buying? The sellers will take us back to 580 guaranteed. Just a waste of money at this point to buy anything above that price.
This is your moment to turn your 1 BTC into 0.5 BTC.
Even with 0.1 BTC he would shit his pants on volatile swings. Better he should by 1000 Doge as I don't know if Doge price could fall to less than 1 Satoshi (so no sellers will be there anymore). And maybe he would not cry for losing his 0.20$ investment.