Billy Markus, co-founder of Dogecoin, humorously commented on Bitcoin's recent plunge, which saw its price drop over $4,000 in less than a day, stating, “Happy Monday.” This sparked discussions among users on social media about the cryptocurrency's volatility.In the meantime, MicroStrategy announced a significant Bitcoin purchase of $243 million, bringing its total holdings to over 450,000 BTC, equivalent to approximately $40.6 billion. Michael Saylor, the company's CEO, has previously expressed intentions to hold Bitcoin indefinitely and predicted its future value could reach $13 million.