Taxes and Stake Sweepstakes

In the United States.

So I’ve won $300 on stake sweepstakes/casino, it only lets me withdraw via crypto. My question is how taxes work in this specific situation, to my knowledge withdrawing the crypto to a wallet is a taxable event and is taxed as regular income at my tax bracket rate.

But when I sell it for USD how does that work, am I taxed on the whole amount of $300 as profit/capital gains or am I basically paying nothing or very little because I haven’t made any notable gains/loss within the time I received and sold the crypto for fiat? I’m just trying to further understand this situation before I attempt withdraw my winnings get into any kind of tax trouble later on. Thanks in advance for the help y’all!