They maintain that the key feature of Bitcoin is that the supply can never exceeda certain number - 21 million - and that it has recovered from previous crashes when its demise was predicted.
Changes in the number of houses for sale are widely seen as a good 'leading indicator' of price-changes: in a boom-period there are more buyers than sellers, so the number of properties for sale diminishes, and in a 'bust' period sellers exceed the number of those willing to buy at current prices, so prices tend to fall, as seems already to be happening in many areas.
Unless their is a sea change in human consciousness, the number of celebrities willing to fly to Moscow for a few million dollars will continue to exceed those who refuse to do so.