lets say usa dollar and all currencies will be highly devalued .....then how we know the btc value??
most traders use USDT so if something happens with usa dollar is my USDT Will be worthless over night?
If all the fiat currency, devalued or goes deeper, we cant guarantee that bitcoin will go up because people are panicking and traders as well. It wont happen overnight and It is being predicted by the economist all you have to do is to keep yourself updated. Convert to gold as much as possible because there is no certainty in bitcoin and it’s very volatile and unpredictable, but if you’re a risk taker keep going.
Governments of each country will not allow their currency to fall as much to the point the their people will choose assets to hold than to use their money. There will be decrease on the value of fiat currencies due to economic issues but it won't be a sudden downfall, it would happen slowly. And as the prices are falling down, governments has to make an action in order to stop the downfall movement of the currencies. So I guess it would still be safe to use fiat and cryptos at the same time. We should not make a drill to convert everything into assets especially in case of USD which is one of the most powerful currencies and is mostly being used in transactions across the world market.