Excess liquidity is causing “bubble like behavior” in certain markets, he said.
Schwarzman, who has a fortune of about $16 billion, is a prominent adviser to President Donald Trump.
Some suspect exchanges are encouraging users to inflate volumes.
Bitcoin's volatility left one futures trader - and an exchange - unable to cover losses this week.
Zhao Changpeng turned Binance into the largest crypto exchange, but he's now feeling the pinch of regulation.
Bitcoin has slumped more than 20 percent this week amid discouraging news.
On America’s over-the-counter stock market, investors lost 27 percent a year on average in the decade through 2010.
The DeVere Group has used aggressive and high fees in going after retirement savings, former brokers say.
The run-up highlights quirks in Hong Kong’s stock market, where wild swings are common.
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