People are panicking in here. Yes, I do think he will be. It will be a year without no vaccine before next summer and therefore very little income from the gates.
Both selling clubs will feel the consequences (Dortmund said so themselves), but also buying clubs will. In a year, PSG will look to both renew Mbappé and Neymar. (2022) and we haven't seen them splash really (also due to FFP constrains). I don't know why people think clubs will have a lot more funds available next year. It's a tiring game, and he will have 1 year left on his contract. He could then basically do an Eriksen or Sanchez for half a year more, so I don't get why the price should go up. There's also a chance for Dortmund that Sancho doesn't have an amazing season. We saw it with Pulisic, who had a form-dip and went to Chelsea a year after he was super-hyped, for a lower fee.