Don’t be so sure about that, because until a few years ago these same Taliban were the world’s number one enemy and the terrorists against whom the US spent hundreds of billions of dollars - and then suddenly overnight they became good guys. Funds frozen abroad now serve as a means of forcing them to move in another direction, in fact one that would be in the interests of the US and the EU.
It is completely absurd to bring the Taliban (at the moment) into any connection with Bitcoin, they have just banned all foreign currencies in the country.
But let's say they have a large amount of BTC, and if their deposit addresses are known, it would be very easy for these funds to be blacklisted (at least as far as all known crypto exchanges are concerned).
On the other hand, in a scenario where bitcoin were adopted in Afghanistan, it wouldn't be good for Taliban anyway, because common citizens could convert their funds into the digital currency, fearing a seizure from the terroristic group, what would weak the influence of the government in the local economical scenario. Actually, crypto miners ran away from the country as soon as Taliban took the power, fearing retaliation against their businesses and freedom of speech by censoring digital gadgets and even the internet.