NEW YORK (Reuters) -Terraform Labs and its founder Do Kwon built a "house of cards" and lied to investors about the stability of a cryptocurrency whose collapse rippled through markets in 2022, a lawyer for the U.S. Securities and Exchange Commission told a Manhattan jury as its civil fraud trial began on Monday. The SEC accused Kwon and the Singapore-based blockchain company of misleading investors in 2021 about the stability of TerraUSD, a stablecoin designed to maintain a value of $1. The regulator also accused them of falsely claiming Terraform's blockchain was used in a popular Korean mobile payment app.