Because crypto not money, its just fraut, and crypto not have real value,
and not backed in gold, gas,oil, silver, and etc.......
Most moneys these days are backed just by faith and some useful features. you think?
this is not true,
money must have backed in something, oil, gas, other money, securities, gold, silver, .......
US dolar not backed and he is dead very soon,
Russia and China have signed an agreement for next 30 years and they do not want the dollar,
just Russian ruble and Chinese yuan.