PANews reported on December 12 that according to Bloomberg, Thomas Peterffy, the billionaire founder of retail brokerage firm Interactive Brokers Group Inc., said that despite the volatility of Bitcoin, investors should hold a certain amount of Bitcoin, but the holdings should be limited. He said: "I recommend that people put 2% to 3% of their net assets into Bitcoin. For example, we will not allow anyone to put more than 10% of their assets into Bitcoin because I think that would be very dangerous." He said that he was "a little scared" due to the price fluctuations of cryptocurrencies. He said: "It has no potential value. Its only value is the same as the paper dollar, which is worthless. I think anyone who doesn't have Bitcoin should have some Bitcoin, but not too much."

It is reported that in 2021, Interactive Brokers launched cryptocurrency trading, and through cooperation with crypto brokerage Paxos Trust Co., users can trade Bitcoin, Ethereum, Litecoin and BCH on the platform. According to the Bloomberg Billionaires Index, Thomas Peterffy is worth about US$53 billion.