I doubt that this recovery can be somehow connected with the past World Cup. Although cryptocurrency is a highly volatile industry, it is not so much tied to every global event due to secondary factors.
One reason I can show you is money laundering. Betsmen already have certain amounts and to legalize that amount in their account they will go to Bitcoin to do that. The sign of this is that Bitcoin has risen sharply after the World Cup, but the price has gone down a bit