no, because bitcoin is legally used in many countries, and its demand is increasing more and more each day, if it lost its value it means that there is no active investor or holder of it, but its impossible right?
Just because bitcoin is legal in many countries does not guarantees about its price will not crash. Look at the oil prices few years ago, they were rising and despite being used by all countries today the price of oil price is dropping. If some countries powerful one decides to ban the cryptocurrencies then it will dent the prices of cryptocurrencies seriously. However there is very low chance of this happening. There are many big financial houses backing and entering the bitcoin business. Countries like Japan have accepted bitcoin and people from the japan are heavily investing in bitcoin. Thus prices are soaring and will remain so in new future. What may happen after that is unknown.