The wealth of American businessman Elon Musk jumped by 19 billion dollars, making him the biggest gainer among the world's billionaires in a single day, according to the Bloomberg Billionaires Index. This significant increase in his wealth came after the official announcement of the launch of Tesla's self-driving "robotaxi" service in Austin, Texas$BTC $BNB #Squar2earn #Write2Earn #BTCbelow100k