Bitcoin is a threat to us if the cryptocurrency is not legalized by the government.
Well i believe otherwise @Akhi600. The threat is the government, controlling our life, our money, which car or house we buy and every step we take. Cryptocurrencies give us the freedom not to be constantly watched and controlled by those governments. And they do all that simply by knowing what our bank accounts are, in which banks, in which countries, and also knowing the amount of money we have.
With cryptocurrencies they cannot do any of those things, we would stop being slaves of their system and that is what they do not want.