Switzerland’s Pando Asset has announced its bid for a spot Bitcoin ETF in the U.S., joining a growing list of contenders. Meanwhile, BlackRock, Inc. (NYSE: BLK) has proposed an updated ETF model in its discussions with the U.S. securities regulator. Pando Asset registered a Form S-1 with the U.S. Securities and Exchange Commission (SEC) on Nov. 29, according to Cointelegraph. The form, used for registering securities with the SEC, was submitted for the Pando Asset Spot Bitcoin Trust, aiming to track Bitcoin’s price. The trust will use Coinbase’s custody services to hold Bitcoin. This makes Pando the 13th competitor