The DOG•GO•TO•THE•MOON (DOG) token, a meme coin issued on Bitcoin's Runes protocol, has seen a 200% surge in the past month, bringing its market cap close to $1 billion. Despite a 60% decline after its launch during the bitcoin halving in April, DOG has become the largest meme coin on Bitcoin and the seventh-largest meme coin overall. DOG's rise is part of a trend of meme-coin activity, with other coins like SHIB, PEPE, and FLOKI also adding billions of dollars to their market caps this year. While most meme coins are issued on super-fast blockchains, DOG is helping establish Runes as a legitimate Bitcoin layer-2 network. However, it's important to note that meme coins are highly volatile and their value is based on social media narrative rather than an underlying use case.