He is one of the richest people on this planet.
It's just that Billy did not buy bitcoins in 2016, so he's angry. Now he tells everyone that crypto currency is bad. Do not pay attention, the person just did not get on the right train on time.
He did not buy bitcoin when the price was at below $1k and now he is spreading bad news about crypto to distract the attention of the investors and make a panic selling. Once the price goes dip Mr. Bill Gates will enter and buy those Bitcoin at cheaper price. Hold and don't get affected.