I am not an expert but based on the way things are going I highly doubt the world will be back to normal by then. But it probably isn’t necessary to cancel right now. Someone told me we shouldn’t cancel airline reservations until the airline cancels, and that way we can be assured of getting a refund without any date/travel restrictions. Do your hotels have cancellation deadlines?
I have cancelled our car rental and hotels for France, but I have not yet cancelled our airline reservations because I am waiting for American Airlines to cancel, which I assume they will. Our trip is for April 10.