Imagine you are a mass-less observer who can travel at any speed at will.
Once you move faster than the speed of light, you will be able to reach the photons that left earth before you, you caught up to it. So you will be in observation, travelling to the past... so its not the future its the past. ie, you will catch up to the photon that left in the past from earth before you did, even ahead of your departure, so you will observe the past, even though your time is still moving forward according to me.
I think they are both great on their own merit. The bulb satisfies a basic need, while crypto is a technological advancement that enhances our basic needs. But of course blockchain truly proves to be a powerful piece of technology. For one, it makes virtual currency possible, something many people are already embracing. It's likely we will tap into more advanced, life-changing and enhancing, virtual applications in the future because of it.