There is no actual basis or reasonable explanation(as much as those invested in it would like to say otherwise) for its current value other than senseless hype that keeps being pumped by those who got in early- So in a sense, I wouldn't even think of it as 'Investing' but rather as gambling and it should be approached in the same way.
In essence, as with most cryptos, if you can afford to lose it all and play it off as just a dumb gamble that will have no financial impact on your life, then I'd say invest in it just for the hell of it. If you can't - don't.
Judging by the way dogecoin grows, I think it is a promising cryptocurrency. I would try to invest my money in this cryptocurrency. It's worth it. I check constantly about how the rate is growing with coinabu. I think this cryptocurrency will surprise us yet. Like many others. Like stella. But I think it will be hard to get more popular than bitcoin.