Crypto betting platform Polymarket has surpassed $1 billion in trading volume, with more than one-third of the volume brought on by wagers in just the last thirty days. Polymarket witnessed $343 million in betting volume as of July 30, a significant step up from $111 million in June and $63 million in May, according to data from Dune Analytics. Fevered speculation over the United States presidential election has been the primary driver of the record volume. To date, over $429 million has been wagered on which presidential candidate will clinch an election victory on Nov. 4, with Donald Trump s…