I mean.. I don't remember the sponsor's logo on the boxer's gloves the last boxing match I watched.
I think it's like impossible to see the bitcoin logo on the boxer's gloves, then considering the speed of the movements that they have.
It would be better on the boxe robe when the athletes enter the ring

but i think is impossible.
would be even better if Mayweather start to buy some btc

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What about painting a big, white letter "B" on Mayweather's back.