Donald and Melania Trump launched new cryptocurrencies over the weekend. Some experts are advising investors to be cautious.

The cryptocurrency Dogecoin ( DOGE -2.23%) saw its value sink this week. The meme coin is trading 15.5% lower as of 4:40 p.m. ET on Jan. 23 but was down as much as 17.5% earlier in the week. The slump comes as the S&P 500 gained 2% and the Nasdaq 100 gained 2.1% on the week.

Now there's a $MELANIA meme coin to go with the $TRUMP cryptocurrency meme coin. Both coin prices rose to generate billions of dollars.

Anthony Pompliano, founder and CEO of Professional Capital Management, discussed the rise of branded “meme coins” like those tied to Donald and Melania Trump.

TRUMP and $MELANIA are currently ranking at 21 and 84 with a market cap of $8 billion and $1 billion, respectively, as of writing on CoinMarketCap. The shift from an anti-crypto to a pro-crypto U.S. government has transformed the crypto market in ways unpredicted.

Donald and Melania Trump's respective tokens have stolen the spotlight from Dogecoin and other long-running meme coins.

The Melania Trump meme coin, a type of cryptocurrency ... potentially positioning itself to challenge Dogecoin's supremacy in the meme coin ecosystem," wrote London-based fintech analyst Boaz ...

Meme coins, which often start as jokes with no real value, are volatile cryptocurrencies that can skyrocket in price if enough people are willing to buy them.

The rise of $TRUMP and $MELANIA, inspired by the current U.S. President and First Lady, is driving meme coin growth. MIND shows shifting investor views.

Dogecoin became a favored cryptocurrency of ... an assassination attempt at a political rally in July. On Sunday, Melania Trump announced her own meme coin with a black-and-white photo of the ...

Dogecoin, the cryptocurrency whose mascot ... It fell sharply later Sunday after Trump and his wife, Melania Trump, posted about a meme coin for her. The Melania coin was trading for around ...

The cryptocurrency market is a battleground for hype-driven tokens and utility-focused projects, with meme coins like those launched under the names of Donald and Melania Trump often enjoying fleeting moments of fame.