Interactive Brokers' Thomas Peterffy on Tesla, markets, crypto and more

Thomas Peterffy, founder and chairman of Interactive Brokers, joins CNBC's 'Squawk Box' to break down January's volatile market action ahead of the last trading session of the month. Peterffy explains why Interactive Brokers' clients like shares of Tesla for the "very, very long-term" and don't want to sell, despite January's volatile market action.