Governments around the world is finding it difficult to control cryptocurrencies. Especially in third world countries where the population is high and the tendency of tax evasion is also high. So they are trying to discourage their citizens from cryptocurrencies. Even in my country, the banks have announced that they wouldn't be providing any services to the crypto exchanges. Their withdrawals suspended and payment gateways are not processing their payments.
How are governments finding it difficult? It has been quite easy in China and the US, eg. Most exchanges have stopped accepting US customers and all the US exchanges are likely going to have to report transactions to the government (it was just proposed yesterday). They are also proposing new, higher taxes on cryptocurrency, which are higher than taxes in other areas like real estate.