David Rosenberg, president of Rosenberg Research and former chief North American economist at Merrill Lynch, criticized Bitcoin's volatility and speculative nature, comparing it to gambling. He suggested that if investors want to get rich with cryptocurrencies, they should 'barbell' their holdings with lottery tickets. Rosenberg's comments come as Bitcoin ETFs gain regulatory approval in the U.S., despite Bitcoin's recent price drop from $49,000 to $44,000. Edward Jones' senior investment strategist, Mona Mahajan, also commented that Bitcoin ETFs could be a speculative part of an investor's portfolio.