While it is true that PPCoin offers some unique and new features compared to most of the other coins I can only recommend you to invest carefully at these prices.
At the moment it has only 2 exchanges, 3 pools, 2 faucets and you can gamble with it. Thats it. The rally during the last 2 days very much reminds of the first bitcoin bubble in 2011 where there was a great future ahead, but actually no practical use.
The same could be said about Litecoin until only recently
You are right, one should practice caution, but I think PPC has enough designed in it where it can be carried forward from here and grow