I agree with you that mark cuban has no idea of what is happening in the financial market and in crypto world by saying that btc will crash.
The downward movement we just experience few days ago is just a pull back with a nice buying opportunity.
To confirm that market will continue its upward movement , the upward movement that follows the pull back broke into five wave with ABC correction in one hour time frame according to elliott wave principle.
When such happen , it set the market to make another impulsive wave which is usually elongated making it to be wave 3 of the higher degree . And this will make btc to continue its all time high.
In conclusion, btc has not find the reversal point that will lead to change of the present trend which is upward trend because our destination has not been reach. So , am still favouring a buying position on btc.