There is nothing much we can do beside trying to convince politicians not to prohibit cryptocurrencies. We all know that governments and banks are usually working together so it might be really difficult if in our countries there won't be any support for keeping cryptocurrencies legal. Some countries with economical problems have already banned Bitcoin. Fortunately, South Korea seems to understand why Bitcoin is important and they are not going to ban it. I still think that it's too late for governments to get rid of Bitcoin by trying to make buying it more difficult.