(Reuters) - Gold is all the rage as investors flee uncertain markets and worry about inflation, but some bankers to the very rich do not take a shine to the precious metal.

Gold prices have spiked 22 percent this year, with investors sending gold futures to record highs of more than $1,337 on Tuesday. The weak dollar, volatility in currency markets and deficit worries boosted demand for the metal as a safe store of value.

Private banking executives, say gold's glittering price tag is or should give their wealthy clients pause.

"We're not really recommending gold right now, just because it's at a level where there are things driving it beyond the types of things (where) that we can add a lot of value," U.S. Trust President Keith Banks said at the Reuters Global Private Banking Summit in New York.

Instead, Banks said gold prices may reflect the surge in demand for gold exchange-traded funds, listed shares that purchase physical gold, and broader worries about government spending leading to rapid price inflation.

"So what exactly is leading to gold at the levels it's at? Your guess is as good as mine," said Banks, who runs the Bank of America (BAC.N) private bank unit.

The SPDR Gold Trust ETF (GLD.P), which lets retail investors more easily bet on gold, has surged 21 percent this year to a record high of 130.71. The fund shares are up more than 50 percent since the end of 2008.

Wealthy families are more interested than ever in owning commodities such as metals and energy, assets that do not move up and down in step with stock and bond prices. They also offer a hedge against inflation, since their values rise with prevailing prices.

There are many critics who warn gold is the latest frenzy and is doomed to collapse.

"With gold being over $1,300 an ounce now, you have people who are asking whether, first, 'Is it another bubble?' and then, 'How far can I ride that bubble?,'" Credit Suisse Americas private banking chief Anthony DeChellis said.

Bessemer Trust Chief Executive John Hilton said his New York wealth management firm allocated a single-digit percentage of its real return fund into gold.

For some clients, he acknowledged, that was not enough.

"We have clients who have made very large individual purchases of gold. Sometimes they'll just say they're doing it, and they'll ask us if we can hold it for them, but we haven't made any large purchases of gold directly for our clients," said Hilton, whose firm manages about $56 billion.