i doubt that fiverr offers crypto payment except they just started it very recently as i made payment on fiver platform a couple of days back and i used paypal in making the payment.I don't really know one fiver and upwork don't offer crypto payment method and they are one of the best freelancing webistes there is one I know tho it called sprout gigs or something like that but I don't recommend it because of really high fees but you can try it if you really want it