Because they are scared that is main reason ,they see that bitcoin becomed ilegall in some countries and also bitcoin is good for normal pupils so they think that our coutries will not allow that cryptocurrency but that is wrong some countries will not support but most will support bitcoin but also some countries will have own unique nathional cryptocurrency like Sweden and Norway.Bitcoin can die only with bad laws in most world countries which dont give to pupil access to bitcoin and also if new bitcoin cryptocurrency enemy coin come better than bitcoin and also if something come what is even better than every cryptocurrency.
I also think that the government - is the main enemy of Bitcoin. Many countries indicate that Bitcoin is dangerous. T
ie the two concepts - Bitcoin and terrorism. All this is bad for the popularization of Bitcoin. Therefore, people do not believe in it
This is a feeble pretext which no one would actually believe in. That's likely the reason why we don't really hear any such claims, at least not on a massive scale. On the other hand, if the government, nevertheless, says that Bitcoin is used to finance terrorism, the law-abiding citizens have all the right to ask why the government is not fighting with terrorism itself. Really, if there are no more terrorists left, there would be nothing to finance, right? Otherwise, that would look like the government is not actually fighting with any terrorism at all...
And in fact they might be sponsoring it themselves