Blockchain is like a revolutionary technology for this world. It has the power to disrupt many sectors/businesses. The best part of blockchain is that it is not going to attack the employee sector but the center. For exapmle, it can be a problem for the UBER but not the drivers. With blockchain drivers can do what UBER does, alone. If blockchain is going yo make it big, cryptocurrencies will go side by side. Those are wrong who says that Blockchain can survive without cryptos or bitcoin in general. But I don't think so. You can't eliminate BTC from a system until people recognize blockchain tech. So, yes cryptos will survive.