WASHINGTON, Dec. 12 — PRIME. The next two or three years may be the worst for the world economy due to the excessive amount of accumulated debts, well-known American investor Jim Rogers said.

Rogers is one of the most famous investors in the world and co-founder of the Quantum investment fund, which he created together with billionaire George Soros. Rogers is the author of a number of books about investing. The Rogers International Commodity Index (RICI) is named after him.

"The next two or three years may be the worst of my life because of the excessive amount of debt," he said.

"So many debt obligations around the world have formed since 2009," the investor said.

Rogers believes that the upcoming period of difficulties may be "very, very bad", which should be a cause for concern. "We will again have economic problems," he said.