Market is relatively very small and most of major companies won't even look at it till it gone reach at least 500 BLN
Unfortunately people think its a bubble now because there were few gains. They never check companies stock on wall street to see that growth that bitcoin and other currencies have now is nothing new. If we gone check history of stock prices of most of the major corporations we will see that btc and other altcoins are on the start of their journey and 20K for one BTC is nothing in years to come