I am afraid it will be not easy to fulfil. It should be a special equipment for a blind person to monitor the websites, even in case it will be some voice bot that will inform about the price of the exact token or coin, there still will be a need in someone's help to set it up. And there is a high risk to lose data or assets. Or, for example, how to get the lear understanding of the situation on the market - not general, but how to make the analysis of the concrete situation of the concrete coin at the interested period of time and so on. But it would be a real know-how in case it would be achieved.