Quantum Computers: Will they break cryptography?

Google just accidentally announced "Quantum Supremacy", and the news has gone wild about fully functional quantum computers just around the corner. I chat to a quantum computing expert Eric Dennis about Google's "Quantum Supremacy". What does this mean for cryptocurrency? Could the cryptography of cryptocurrency be broken? Is the cryptography protecting our daily internet activities still safe? Will quantum computers mean fully predictive climate models and data processing like the media suggests, or are they delusional?