Hate to say it, but it's actually a good point and it makes sense. You could argue tho, that with crypto-to-crypto trade you don't earn "money", so you can't make provisions for the tax due, but still you could convert appropriate portion of your cryptos to fiat... This shit can be a minefield.
I do recall more than a few Americans saying they owed vastly more in tax than they had in their wallet due to crypto when tax season came around but perhaps they haven't interpreted their tax laws correctly. I dunno what the deal is with losses.
Everything hangs on where you live. What'll have you jailed somewhere, won't even be a problem elsewhere. But in other areas of life it's your lookout to put your tax cut aside no matter what subsequently happens.
Anyway, if I were running this forum I would not have a legal section. Nothing good comes of asking the internet clueless about stuff like this.