That tweet was just only a joke. Elon didn't really mean to pump Mars coin since it just coincidence for crypto to have same name like he tweet. It was different story with what happened with DOGE.
When i see on CMC, on Mars Coin it said This project isn't affiliated with Elon Musk. Haha
Agree with you, at the moment I only see btc and doge that are coins that Elon has shiller for a while. But basically we should focus more on the obvious projects in this market, instead of waiting for the tweet. I'm not in denial that Elon is making this market more exciting, but the way he's doing it I'm seeing it is not an effective way of helping this market.
After all, experienced users and whales know that this is pump & dump. It's new users who don't realize it and buy (for example) DOGE with life savings, yet the price is based on only a few tweets. Sooner or later the price will drop and they will lose a lot of money. Posting such tweets as Elon Musk do is very irresponsible in my opinion.
That coin is available on a small exchange, so I think that does not attract many traders to trade. But still, for people who can get a profit from that coin and that moment, they are really making a big profit. The price now is back to the last lower price, and it seems the party is over now. I wonder what will be the next coin that Elon will say about, and I wonder if that can make a coin increase too or not.
Of course, he did it without even realizing that such a coin exist. However, he still managed to pump the price by several hundred percent.