Yes, for short-term investment, I don't think there is a problem, as long as it's not for the long term,
when you are profitable, sell it immediately and don't hold it,
the influence of Elon Musk is indeed extraordinary but it seems that Dogecoin is difficult to repeat the glory at that time.
Dogecoin pumps whenever a tweet is made by the people that controlled the market with their gigantic buy and sell option. I'm keeping dogecoin for short term, more like scalping the project. Elon Musk is the hype influenced and whale behind the pump and dump of dogecoin. I see it as a gambling coin, it trades smoothly with the tweets of these influential whales in the space. For instance, Elon Musk makes tweets concerning the project which will either trigger a dump or a pump, the people suffering it as the newbies, the ones that have no idea about the formalities of the market.
This is just a game of millionaires to increase or decrease the price of coins later. But many people know doge and it doesn't matter if the coin grows bigger and has a greater chance of making a profit for those who hold it.