Due to the massive amount of capital gains taxes owed on crypto, Tom Lee believes there will be a sell off in order to pay these taxes. Following tax day, he believes Bitcoin will find footing again.
So this is only a problem for the people cashing out, and if they've cashed out then they should have the cash to cover their tax bill.
And this assumes they didn't cash out to the Cayman Islands account. Probably not a lot of capital gains will be reported to the IRS this year for cryptocoin related profits.