I honestly think that DOGE will survive longer than 99% of the other altcoins.

But this coins should not be taken too serious, buy some, hold them, spend then, give them away or sell them later, do it for the lulz.
 
I am currently having a small stash, some 1.5M if including my physical coins as well, not planing to get rich or anything like that. I just find the coin fun to play around with.

About when is a good time to get in? I think  5 days ago when it was at 38 satoshi was a good time to buy.
Now are we at 47, much harder to say now. From here could it briefly jump to the 80ties, it could also go back to 20-30ties. I don't think we will see 250+ again. Keep in mind there are soo many DOGE coin mined every single day.
In order for the price to go radically up, then must someone buy all these coins.