Solana founder: Privacy is not the core factor of product PMF According to a report by Golden Finance, some community users have pointed out that the "biggest problem of DeFi at present" is the lack of tokens with sustainable income and demand, insufficient privacy, and the lack of unsecured lending as the main challenges. Solana founder Toly commented that privacy is not a core factor in product market fit (PMF) and alone is not sufficient to significantly change user behavior.