If bitcoin starts sponsoring a big soccer team in Europe,that would greatly increase it's exposure.
That the best idea i heard today.
However I don't think the bitcoin foundation has that kind of budget. They have to pay at least 20M+ to sponsor a club like Barca or AC Milan
They could start with a few local clubs and go from there. Certain things have to start out small to reach their full potential. I think that if bitcoin would start sponsoring a soccer team, more people would be aware, like parents at their kids football club on a Saturday.