What makes Bitcoin and other CryptoCurrencies go up in value

What makes Bitcoin and other CryptoCurrencies go up in value? Francis Hunt, stock market trader and educator comments. Is it hype, speculation or some real/virtual value? Is the Cryptocurrency rush we are experiencing like the .com bubble? Is it a bubble or are Cryptocurrencies here to stay? Do people use the currency for anything besides speculation? What makes Bitcoin go up in value? Bitcoin, Ethereum, Ripple and Litecoin collectively have around a ~$90 billion valuation. Can they really be worth this much? It is partly hype but it also supply and demand. I think we are in a transition and as a result there is a wall of money that needs to move in the crypto world. So are we experiencing a CryptoCurrency rush? I would avoid the word Bubble - there might be parallels with the Dot-Com but cryptocurrencies probably aren't going away in the long run.