If you see the past market history of bitcoin you can clearly see that bitcoin have made more than 2x gain in a single year every year from its start so by watching that I can speculate that it will continue to do so in the future also, so it is a bright idea to invest in bitcoins now as price can go upwards, no one knows when and right now the price is way lower than anyone could have expected but I am pretty sure that bitcoin will rise in the coming future.