It's caused by he was an agenda for doge coin. Remember that elon was mentioning on his tweet if he needs a crypto that can be used in mars and doge coin is including on his project.
he was also buying lots of doge coins and you must see that there are some addresses that owned more than 50% of total supply.
Elon will not buy something if that will not be really useful for him. The communities have been talking about this since at the end of last year.
Lol how do some addresses own more than 50% of the coin. I mean doesn't math tell you only one address could ever own more than 50% of anything. If you mean some addresses combine to own 50% of the coin those are just exchange addresses. It's a shame but most new people enjoy leaving their crypto on exchanges and use them as a wallet...the pain they will eventually see by that decision will hurt. Hard lessons will be learned.