The Cryptocurrency Market is currently sitting at a little over $467 billion. With the introduction of Bitcoin Futures, it should be fair to assume that the crypto currency market cap will be around half a trillion dollars or $500 billion. The Crypto Market will then be ready to approach the market company of the biggest companies in this world including Google, Amazon, Facebook, Tencent, etc.
The Cryptocurrency Market cap or even just the Bitcoin Market Cap might be larger by end of 2018 than these big companies. If the crypto market can continue to climb and hold its ground in 2018, then it should be fair to assert that the crypto market is here to stay and that it's not just some bubble.