"Gold rises with inflation and in times of crisis, like we have today; and, as a result, many countries are buying gold," says Mary Anne and Pamela Aden.

The long-standing resource sector expert and co-editors of The Aden Forecast explain, "They know it's the ultimate currency and gold is again taking its place in the global monetary system, as it has for thousands of years.

"The actions of the world's central banks tell the story. At the very least, this is going to keep upward pressure on gold in the years ahead.

"We hear that gold is in a bubble, it can't rise much further and so on," content resource experts Mary Anne and Pamela Aden.

The co-editors of The Aden Forecast explain, "Many wonder, why is it even rising so much? For that, you have to look at history from a global perspective and it'll provide the answer.

"We've often pointed out that gold is money. It has been for thousands of years. Paper money is not really money and there isn't one paper currency that has survived over time.

"You need to be prepared for the possibility of a correction in gold," says resource specialist Curtis Hesler, who adds, "Looking at the long term, however, gold will probably double from current levels."

The editor of The Professional Timing Service explains, "As such, the key is to buy fear and sell comfort. Here we look at a trio of favorite closed-end funds invested in the metals sector.

"Gabelli Global Gold and Nautral Resources & Income (GGN) s a closed-end fund investing in a variety of tangible asset plays.

Some 90% of their holdings are in equities, which are balanced about 32% in energy and 58% in metals and mining. They also hold convertible bonds in these two sectors.

Mary Anne and Pamela Aden are among the advisory world's top authorities on metals and resources.

In a recent Q&A session, the editors of The Aden Forecast answer the most common questions that they are asked by readers as to the current state and future outlook for the precious metals markets.

In addition, the sisters answer what they say is the most frequent question they receive: "What is the best way to buy gold." Here, they offer a review of five strategies for investing in gold, including their top picks among stocks, closed-end funds and ETFs.