0657 GMT - Bitcoin remains elevated above $81,000 after reaching a two-and-a-half-week high overnight. Bitcoin is supported by stronger exchange traded fund inflows, positive regulatory developments and investors closing earlier bets against the cryptocurrency, Zaye Capital Markets analyst Naeem Aslam says in a note. The U.S. Securities and Exchange Commission has introduced a five-year exemption for platforms that facilitate trading tokenized stocks and other securities through blockchain technology. This could strengthen confidence in the wider blockchain ecosystem by reducing uncertainty around how institutional products and trading venues will operate, Aslam says. A more constructive U.S. tone ahead of talks with China could also improve risk appetite, he says. Bitcoin rises 0.5% to $81,520 after reaching as high as $82,050 overnight, LSEG data show.