Not sure about single digits, but check out this recent article. (just ignore the 1st half of his post since it's the usual arguments you're probably tired of hearing being debated on this forum and elsewhere - "bitcoin unfit as currency, it's flawed, blah blah blah").I would love for this to go back to $10 so I can back up the truck. That would be a once in a lifetime opportunity for late comers to buy it cheap.
Right now I would put 1/2 my money in bitcoin and the other half in cash to buy should it drop so low. The odds suggest it's going to $500 soon but having some $ on the sidelines should it go back to single digits seems prudent.
What's interesting is the latter half of his post. Due to recent events (The China bubble burst, etc) he thinks it may go down to $10. Ya never know. Cash out now and wait till it hits $10 and BUY BUY BUY lol
The Bitcoin Meltdown Has Begun - Business Insider