SoftBank and ARK are reportedly eyeing an investment in Tether, a move that could value the stablecoin issuer at up to $500 billion as it diversifies beyond USDT. At least two high-profile investment companies are reportedly vying to back stablecoin issuer Tether as it looks to sell roughly 3% of its equity — a move that underscores pent-up investor demand for one of the world’s most profitable companies.