Original sentence: The founding of Netscape was a pivotal point that helped launch the Internet IPO boom on Wall Street during the mid to late 1990s, and Clark reaped the financial benefits of the Internet boom -- with an investment of $5 million US, he earned $2 billion US
Edited sentence: The founding of Netscape was a pivotal point that helped launch the Internet IPO boom on Wall Street during the mid to late 1990s, and Clark reaped the financial benefits of the Internet boom—with an investment of $5 million US, he earned $2 billion US