While the intentions of governments to unite in order to ban, or even limit the circulation of cryptocurrency, is not planned. On the contrary, the reverse trend is likely to occur. As can be seen from another topic in this section, 111 states actually recognized the circulation of cryptocurrency as legal and only in ten states are considered illegal. So there is no reason yet to fear that the government may unite to prohibit the circulation of cryptocurrency.
So far, some governments have been against each other, which proves the lack of agreement among the same. It'll be hard for all the world's governments to threaten the very existence of Bitcoin and other cryptocurrencies. Even if it does happen (which is very unlikely), people will resort to other means in order to support the longevity of cryptocurrencies. Until now, Bitcoin has been very beneficial to governments for taxing purposes.
Which means that Bitcoin and other cryptocurrencies will be here to stay for that very reason. As with any technology, Blockchain tech is a double-edged sword. It can be used for both legal and illegal purposes. As such, Bitcoin's legitimacy would prove itself with proper regulatory measures from governments worldwide. Only then, Bitcoin will be here to stay for many generations.
Nonetheless, while a massive government crackdown is highly unlikely now, Bitcoin's existence could be at risk in the event of a global catastrophe (such as the Internet shutting down, global power outage, etc). Just my opinion
