Hello, There is ongoing talk about bitcoin that this bubble is going to explode soon. I learned about Bitcoin from http://technogeek.review/ and I have invested about 1.5 lakh in Bitcoins. even the same website is saying that it is going to end soon. Currently, I am in the loss, so can not even withdraw my money 
Right now there is no bubble and nothing is going to burst. If anything we may enter in to a bear market for an extended period but there will be no such flash crash where the price goes to 0 or as good as 0. Maybe in the future but not now.