Well I don't really know his plans, if he believes in crypto he wouldn't compare a coin with no use case like doge to bitcoin which is really strange, well i think he did the shilling so as to benefit from it, maybe he might have invested in it when it was low, then hype the token it pumped then he made profits, he is a business man and his interest will always be at making profit, or maybe he has a deal with the owner of doge. I think I saw a recent post on Twitter stating SpaceX accepting doge as means of Payment, all this is just to pump the price of doge.
Well, the other case is that his Tesla company has bought bitcoin amounting $1.5B. Whilst for Dogecoin, he doesn't give any statement how much they own and how much they've acquired through it.
The exposure he is giving to Dogecoin is probably really for his companies but at the same time, he probably is going to dump all of his Dogecoins since he's aware of what really is.I have the same vibes coming from what he is like and what he has done in the past when it comes to his company and share holders.
He'll ride the wave until the tide comes in as they say.
He isnt a genius for nothing so obviously has something instore for doge coin as it was mentioned several times form him, whether it be a joke or to be taken seriously, it will be the currency used for his spacex journeys and most possibly on mars.
Unless he is just testing out the crypto waters and just going to create his own coin to use there similar to doge but with his face on it.
Here is a good video to watch about how they view it as well:
https://www.youtube.com/watch?v=grGauqJyiSA