Cryptocurrency fans may have gotten more than they bargained for when the president and his wife launched a pair of tokens last week.

But the launch of the so-called meme-coin - a cryptocurrency with no utility other than for fun or speculation - has been widely criticised by industry insiders. "Trump's comments about not knowing much about the coin back up my opinion that he is making a mockery of the industry. It's a stunt," says Danny Scott, CEO of CoinCorner.

When Donald Trump's companies released a celebrity meme coin just ahead of the presidential inauguration, it set a new standard for instant hype in a cryptocurrency launch, based on fresh research from a blockchain tax startup.